v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000015708 | 594918104 | Microsoft Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000015708 | 969457100 | Williams Cos., Inc. (The)  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000015708 | 023135106 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000015708 | 631103108 | Nasdaq, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015708 | 025537101 | American Electric Power Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015708 | 018802108 | Alliant Energy Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000015708 | 166764100 | Chevron Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000015708 | 235851102 | Danaher Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015708 | G0692U109 | Axis Capital Holdings Ltd.  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015708 | G6700G107 | nVent Electric plc  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015708 | 053611109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015708 | 31846V567 | Money Market  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000015708 | 02079K305 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000015708 | 742718109 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000015708 | 018802108 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000015708 | 166764100 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000015708 | 872540109 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
C000015708 | 98978V103 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
C000015708 | 032095101 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000015708 | G3223R108 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
C000015708 | 461202103 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
C000015708 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 97.60%
C000015708 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000244749 | 594918104 | Microsoft Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000244749 | 969457100 | Williams Cos., Inc. (The)  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000244749 | 023135106 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000244749 | 631103108 | Nasdaq, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000244749 | 025537101 | American Electric Power Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000244749 | 018802108 | Alliant Energy Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000244749 | 166764100 | Chevron Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000244749 | 235851102 | Danaher Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000244749 | G0692U109 | Axis Capital Holdings Ltd.  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000244749 | G6700G107 | nVent Electric plc  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000244749 | 053611109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244749 | 31846V567 | Money Market  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000244749 | 02079K305 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000244749 | 742718109 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000244749 | 018802108 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000244749 | 166764100 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000244749 | 872540109 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
C000244749 | 98978V103 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.90%
C000244749 | 032095101 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000244749 | G3223R108 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 17.70%
C000244749 | 461202103 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
C000244749 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 97.60%
C000244749 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000015712 | 025932104 | American Financial Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015712 | 759509102 | Reliance, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015712 | 08265T208 | Bentley Systems, Inc., Class B  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015712 | 053611109 | Avery Dennison Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015712 | 48020Q107 | Jones Lang LaSalle, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015712 | 913259107 | Unitil Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015712 | 268150109 | Dynatrace, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015712 | 981475106 | World Kinect Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015712 | 03783C100 | Appfolio, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000015712 | 23345M107 | DT Midstream, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000015712 | 31846V567 | Money Market  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000015712 | 650111107 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000015712 | 05550J101 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000015712 | 049560105 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000015712 | 85254J102 | Real Estate  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000015712 | 03676B102 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000015712 | 969904101 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000015712 | 420261109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
C000015712 | 042744102 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000015712 | 759916109 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000015712 | 199908104 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
C000015712 | L44385109 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
C000015712 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000015712 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000244750 | 025932104 | American Financial Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000244750 | 759509102 | Reliance, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244750 | 08265T208 | Bentley Systems, Inc., Class B  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244750 | 053611109 | Avery Dennison Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000244750 | 48020Q107 | Jones Lang LaSalle, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000244750 | 913259107 | Unitil Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000244750 | 268150109 | Dynatrace, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000244750 | 981475106 | World Kinect Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000244750 | 03783C100 | Appfolio, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000244750 | 23345M107 | DT Midstream, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000244750 | 31846V567 | Money Market  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000244750 | 650111107 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000244750 | 05550J101 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000244750 | 049560105 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000244750 | 85254J102 | Real Estate  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000244750 | 03676B102 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000244750 | 969904101 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000244750 | 420261109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 10.80%
C000244750 | 042744102 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000244750 | 759916109 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000244750 | 199908104 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 18.00%
C000244750 | L44385109 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
C000244750 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 99.40%
C000244750 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000071343 | 450737101 | Iberdrola S.A.  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000071343 | 835699307 | Sony Group Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000071343 | 874039100 | Taiwan Semiconductor Manufacturing Co. Ltd.  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000071343 | 168919108 | China Construction Bank Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000071343 | 771195104 | Roche Holding AG  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000071343 | 455807107 | Industrial & Commercial Bank of China Ltd.  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000071343 | 80687P106 | Schneider Electric SE  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000071343 | 88032Q109 | Tencent Holdings Ltd.  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000071343 | 889094108 | Tokio Marine Holdings, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000071343 | 606822104 | Mitsubishi UFJ Financial Group, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000071343 | Jersey  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000071343 | Sweden  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000071343 | United States  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000071343 | Singapore  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000071343 | Denmark  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000071343 | Philippines  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000071343 | South Africa  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000071343 | Italy  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000071343 | Netherlands  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000071343 | South Korea  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000071343 | Mexico  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000071343 | Brazil  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000071343 | Cayman Islands  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000071343 | Australia  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000071343 | Hong Kong  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000071343 | Spain  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000071343 | India  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000071343 | Taiwan Province of China  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000071343 | China  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000071343 | Switzerland  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000071343 | France  
Holdings [Line Items]  
Percent of Net Asset Value 7.50%
C000071343 | Germany  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000071343 | Canada  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000071343 | United Kingdom  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000071343 | Japan  
Holdings [Line Items]  
Percent of Net Asset Value 15.20%
C000071343 | Industrials000375204  
Holdings [Line Items]  
Percent of Total Investments 98.60%
C000071343 | Cash & Equivalent31846V567  
Holdings [Line Items]  
Percent of Total Investments 0.50%
C000071343 | Financials465562106  
Holdings [Line Items]  
Percent of Total Investments 0.90%
C000015709 | U.S. Treasury Notes_1.5_2030-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000015709 | U.S. Treasury Notes_2.75_2028-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000015709 | U.S. Treasury Notes_4.5_2025-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000015709 | U.S. Treasury Notes_2.375_2029-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000015709 | Emerson Electric Co._2_2028-12-21  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015709 | Bank of America Corp._5.202_2029-04-25  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015709 | Enterprise Products Operating, LLC_5.05_2026-01-10  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015709 | MPLX, L.P._1.75_2026-03-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015709 | American Express Co._1.65_2026-11-04  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015709 | Allstate Corp. (The)_0.75_2025-12-15  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015709 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000015709 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000015709 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015709 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
C000015709 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000015709 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 18.60%
C000015709 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 20.60%
C000015709 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
C000015709 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015709 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 12.00%
C000015709 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 64.50%
C000015709 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000015709 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000015709 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 18.70%
C000244751 | Bank of America Corp._5.202_2029-04-25  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244751 | U.S. Treasury Bonds_4.25_2039-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000244751 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000244751 | U.S. Treasury Bonds_3.125_2044-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000244751 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000244751 | U.S. Treasury Bonds_3_2044-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000244751 | FNMA_1.52_2035-08-21_2022-25  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000244751 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244751 | FHLMC_3_2052-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244751 | FNMA_2_2042-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244751 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000244751 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244751 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000244751 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 26.60%
C000244751 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000244751 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
C000244751 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
C000244751 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
C000244751 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000244751 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000244751 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 26.80%
C000244751 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 46.10%
C000244751 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000244751 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244751 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000244751 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000200604 | Bank of America Corp._5.202_2029-04-25  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000200604 | U.S. Treasury Bonds_4.25_2039-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000200604 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000200604 | U.S. Treasury Bonds_3.125_2044-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000200604 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000200604 | U.S. Treasury Bonds_3_2044-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000200604 | FNMA_1.52_2035-08-21_2022-25  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000200604 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200604 | FHLMC_3_2052-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000200604 | FNMA_2_2042-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000200604 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000200604 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000200604 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200604 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 26.60%
C000200604 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000200604 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
C000200604 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
C000200604 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
C000200604 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000200604 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200604 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 26.80%
C000200604 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 46.10%
C000200604 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000200604 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000200604 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000200604 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000015718 | Bank of America Corp._5.202_2029-04-25  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015718 | U.S. Treasury Bonds_4.25_2039-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.40%
C000015718 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000015718 | U.S. Treasury Bonds_3.125_2044-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000015718 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000015718 | U.S. Treasury Bonds_3_2044-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000015718 | FNMA_1.52_2035-08-21_2022-25  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000015718 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015718 | FHLMC_3_2052-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015718 | FNMA_2_2042-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015718 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000015718 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015718 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015718 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 26.60%
C000015718 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000015718 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.70%
C000015718 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 14.60%
C000015718 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 19.40%
C000015718 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000015718 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015718 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 26.80%
C000015718 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 46.10%
C000015718 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000015718 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015718 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000015718 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000015717 | U.S. Treasury Notes_1.5_2030-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000015717 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000015717 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015717 | U.S. Treasury Notes_3.5_2030-01-31  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000015717 | U.S. Treasury Notes_2.875_2032-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000015717 | U.S. Treasury Notes_0.875_2030-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000015717 | U.S. Treasury Notes_2.75_2032-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000015717 | U.S. Treasury Notes_4_2030-02-28  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000015717 | FHLB_4.75_2032-12-10_HQ-2032  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015717 | Truist Financial Corp._2.25_2030-03-11  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015717 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000015717 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015717 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015717 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000015717 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
C000015717 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 32.70%
C000015717 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
C000015717 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
C000015717 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000015717 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015717 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000015717 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 51.70%
C000015717 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000015717 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000015717 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 33.10%
C000015717 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000200603 | U.S. Treasury Notes_1.5_2030-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000200603 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000200603 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200603 | U.S. Treasury Notes_3.5_2030-01-31  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000200603 | U.S. Treasury Notes_2.875_2032-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000200603 | U.S. Treasury Notes_0.875_2030-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000200603 | U.S. Treasury Notes_2.75_2032-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000200603 | U.S. Treasury Notes_4_2030-02-28  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000200603 | FHLB_4.75_2032-12-10_HQ-2032  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200603 | Truist Financial Corp._2.25_2030-03-11  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200603 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000200603 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200603 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200603 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000200603 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
C000200603 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 32.70%
C000200603 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
C000200603 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.60%
C000200603 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000200603 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200603 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000200603 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 51.70%
C000200603 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000200603 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000200603 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 33.10%
C000200603 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000015716 | U.S. Treasury Notes_2.75_2028-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015716 | U.S. Treasury Notes_2.375_2029-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000015716 | Emerson Electric Co._2_2028-12-21  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015716 | Allstate Corp. (The)_0.75_2025-12-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015716 | U.S. Treasury Notes_2.875_2028-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015716 | U.S. Treasury Notes_2.625_2029-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000015716 | Interstate Power & Light Co._3.4_2025-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000015716 | KeyCorp_4.15_2025-10-29_O  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015716 | Morgan Stanley_3.591_2028-07-22  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000015716 | Duke Energy Corp._0.9_2025-09-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015716 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015716 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000015716 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015716 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000015716 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
C000015716 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 14.20%
C000015716 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 21.90%
C000015716 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 30.90%
C000015716 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015716 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
C000015716 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 66.80%
C000015716 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015716 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000015716 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000200602 | U.S. Treasury Notes_2.75_2028-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000200602 | U.S. Treasury Notes_2.375_2029-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000200602 | Emerson Electric Co._2_2028-12-21  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200602 | Allstate Corp. (The)_0.75_2025-12-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200602 | U.S. Treasury Notes_2.875_2028-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200602 | U.S. Treasury Notes_2.625_2029-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000200602 | Interstate Power & Light Co._3.4_2025-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000200602 | KeyCorp_4.15_2025-10-29_O  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200602 | Morgan Stanley_3.591_2028-07-22  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000200602 | Duke Energy Corp._0.9_2025-09-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200602 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200602 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000200602 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200602 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000200602 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 13.50%
C000200602 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 14.20%
C000200602 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 21.90%
C000200602 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 30.90%
C000200602 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200602 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 13.20%
C000200602 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 66.80%
C000200602 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200602 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000200602 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 14.30%
C000229855 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000229855 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000229855 | FNMA_2_2042-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000229855 | Truist Financial Corp._2.25_2030-03-11  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000229855 | FNMA_3.5_2050-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000229855 | FHLMC_2_2042-05-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000229855 | FNMA_4_2051-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000229855 | PepsiCo, Inc._5_2035-02-07_2020 D  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000229855 | U.S. Bancorp_4.967_2033-07-22_BB  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000229855 | U.S. Treasury Bonds_2.375_2042-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000229855 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000229855 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000229855 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 27.00%
C000229855 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000229855 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000229855 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000229855 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 25.60%
C000229855 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000229855 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000229855 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 27.20%
C000229855 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 62.30%
C000229855 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 1.00%
C000229855 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000229855 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000015715 | Ohio Higher Education Facilities Revenue - Denison University_5_2053-11-01_2021-A  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000015715 | Ohio State Water Development Authority Revenue_5_2046-06-01_2021  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000015715 | Pennsylvania Economic Development Financing Authority UPMC Revenue_5_2060-03-15_2025-A  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015715 | Ohio State Water Development Authority Revenue_4_2046-12-01_2021-A  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015715 | FHLMC_2.55_2035-06-15_M-053  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015715 | Kings LSD Ohio School Improvement_5.25_2054-12-01_2024  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015715 | Ohio Hospital Facility Revenue Refunding Cleveland Clinic Health_4_2036-01-01_2017-A  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015715 | Miami University Ohio General Receipts Revenue_4_2045-09-01_2020-A  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000015715 | Grandview Heights Ohio Municipal Facilities Construction and Improvement_4_2046-12-01_2023  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000015715 | Hamilton County Ohio Hospital Facilities Revenue Cincinnati Children's_5_2041-11-15_2019-CC  
Holdings [Line Items]  
Percent of Net Asset Value 1.50%
C000015715 | North Dakota  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000015715 | Illinois  
Holdings [Line Items]  
Percent of Total Investments 0.30%
C000015715 | Georgia  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000015715 | North Carolina  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000015715 | Michigan  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000015715 | Virginia  
Holdings [Line Items]  
Percent of Total Investments 1.40%
C000015715 | Alabama  
Holdings [Line Items]  
Percent of Total Investments 1.60%
C000015715 | Colorado  
Holdings [Line Items]  
Percent of Total Investments 2.00%
C000015715 | Missouri  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000015715 | Indiana  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000015715 | Texas  
Holdings [Line Items]  
Percent of Total Investments 3.60%
C000015715 | Pennsylvania  
Holdings [Line Items]  
Percent of Total Investments 3.90%
C000015715 | N/A  
Holdings [Line Items]  
Percent of Total Investments 4.00%
C000015715 | Kentucky  
Holdings [Line Items]  
Percent of Total Investments 6.00%
C000015715 | Ohio  
Holdings [Line Items]  
Percent of Total Investments 68.60%
C000015715 | AAA  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000015715 | AA  
Holdings [Line Items]  
Percent of Net Asset Value 57.70%
C000015715 | A  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
C000015715 | BBB  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000015715 | Not Rated  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000015715 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000015715 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 98.80%