v3.26.1
Shareholder Report, Holdings (Details)
Jun. 30, 2026
C000015708 | 594918104 | Microsoft Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000015708 | 92826C839 | Visa, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000015708 | 863667101 | Stryker Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000015708 | 025537101 | American Electric Power Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000015708 | 969457100 | Williams Cos., Inc. (The)  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000015708 | 023135106 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000015708 | G6700G107 | nVent Electric plc  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000015708 | 032654105 | Analog Devices, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000015708 | 902788108 | UMB Financial Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015708 | 02079K305 | Alphabet, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015708 | 31846V567 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015708 | 053611109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015708 | 02079K305 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015708 | 018802108 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000015708 | 166764100 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000015708 | 742718109 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000015708 | 03073E105 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000015708 | 372460105 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
C000015708 | 320517105 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000015708 | 43849R105 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
C000015708 | 461202103 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 27.30%
C000015708 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
C000015708 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000244749 | 594918104 | Microsoft Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000244749 | 92826C839 | Visa, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000244749 | 863667101 | Stryker Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000244749 | 025537101 | American Electric Power Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000244749 | 969457100 | Williams Cos., Inc. (The)  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000244749 | 023135106 | Amazon.com, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000244749 | G6700G107 | nVent Electric plc  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000244749 | 032654105 | Analog Devices, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000244749 | 902788108 | UMB Financial Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000244749 | 02079K305 | Alphabet, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000244749 | 31846V567 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000244749 | 053611109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244749 | 02079K305 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000244749 | 018802108 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 4.00%
C000244749 | 166764100 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 5.90%
C000244749 | 742718109 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 6.90%
C000244749 | 03073E105 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000244749 | 372460105 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 11.10%
C000244749 | 320517105 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000244749 | 43849R105 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 16.60%
C000244749 | 461202103 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 27.30%
C000244749 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 99.90%
C000244749 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000015712 | 902788108 | UMB Financial Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015712 | 159864107 | Charles River Laboratories International, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000015712 | 781846209 | Rush Enterprises, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015712 | 655663102 | Nordson Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015712 | 759509102 | Reliance, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015712 | 87162W100 | TD SYNNEX Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015712 | 28618M106 | Element Solutions, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015712 | 537008104 | Littelfuse, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015712 | 257651109 | Donaldson Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015712 | 372460105 | Genuine Parts Co.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015712 | 31846V567 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000015712 | 650111107 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000015712 | 05550J101 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015712 | 23345M107 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000015712 | 736508847 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015712 | 85254J102 | Real Estate  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000015712 | 882681109 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000015712 | 420261109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000015712 | 97650W108 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000015712 | 902252105 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
C000015712 | 759916109 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
C000015712 | 01973R101 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 25.30%
C000015712 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
C000015712 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000244750 | 902788108 | UMB Financial Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244750 | 159864107 | Charles River Laboratories International, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000244750 | 781846209 | Rush Enterprises, Inc., Class A  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244750 | 655663102 | Nordson Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244750 | 759509102 | Reliance, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244750 | 87162W100 | TD SYNNEX Corp.  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000244750 | 28618M106 | Element Solutions, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000244750 | 537008104 | Littelfuse, Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000244750 | 257651109 | Donaldson Co., Inc.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244750 | 372460105 | Genuine Parts Co.  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000244750 | 31846V567 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000244750 | 650111107 | Communications  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000244750 | 05550J101 | Consumer Staples  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244750 | 23345M107 | Energy  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000244750 | 736508847 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000244750 | 85254J102 | Real Estate  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000244750 | 882681109 | Consumer Discretionary  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000244750 | 420261109 | Materials  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000244750 | 97650W108 | Financials  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000244750 | 902252105 | Technology  
Holdings [Line Items]  
Percent of Net Asset Value 15.50%
C000244750 | 759916109 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 17.50%
C000244750 | 01973R101 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 25.30%
C000244750 | InvestmentType_Common Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 99.80%
C000244750 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000015709 | U.S. Treasury Notes_1.5_2030-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000015709 | U.S. Treasury Notes_2.75_2028-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000015709 | U.S. Treasury Notes_2.375_2029-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000015709 | FHLMC_4.25_2031-06-15_5607  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000015709 | Cisco Systems, Inc._4.85_2029-02-26  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015709 | Bank of New York Mellon Corp._3.3_2029-08-23_K  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015709 | U.S. Treasury Notes_2.75_2027-07-31  
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 | U.S. Treasury Notes_4_2031-01-31  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015709 | Morgan Stanley_3.591_2028-07-22  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015709 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000015709 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015709 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015709 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 12.40%
C000015709 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 16.00%
C000015709 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 18.80%
C000015709 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 20.20%
C000015709 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 26.80%
C000015709 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000015709 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 19.10%
C000015709 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 60.30%
C000015709 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000015709 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000015709 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 16.20%
C000244751 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000244751 | U.S. Treasury Bonds_4.25_2039-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000244751 | U.S. Treasury Bonds_3.125_2044-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000244751 | U.S. Treasury Bonds_3_2044-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000244751 | U.S. Treasury Bonds_4.75_2056-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
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 | Verizon Communications, Inc._2.355_2032-03-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244751 | Honeywell Aerospace, Inc._4.6_2033-03-16  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244751 | U.S. Treasury Bonds_2.375_2042-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000244751 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000244751 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000244751 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
C000244751 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 24.90%
C000244751 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000244751 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
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 25.10%
C000244751 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 49.70%
C000244751 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000244751 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000244751 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000200604 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000200604 | U.S. Treasury Bonds_4.25_2039-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000200604 | U.S. Treasury Bonds_3.125_2044-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000200604 | U.S. Treasury Bonds_3_2044-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000200604 | U.S. Treasury Bonds_4.75_2056-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
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 | Verizon Communications, Inc._2.355_2032-03-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200604 | Honeywell Aerospace, Inc._4.6_2033-03-16  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200604 | U.S. Treasury Bonds_2.375_2042-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000200604 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000200604 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000200604 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
C000200604 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 24.90%
C000200604 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000200604 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
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 25.10%
C000200604 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 49.70%
C000200604 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000200604 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000200604 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000015718 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000015718 | U.S. Treasury Bonds_4.25_2039-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000015718 | U.S. Treasury Bonds_3.125_2044-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000015718 | U.S. Treasury Bonds_3_2044-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000015718 | U.S. Treasury Bonds_4.75_2056-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
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 | Verizon Communications, Inc._2.355_2032-03-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015718 | Honeywell Aerospace, Inc._4.6_2033-03-16  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015718 | U.S. Treasury Bonds_2.375_2042-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015718 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000015718 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 12.70%
C000015718 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.60%
C000015718 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 24.90%
C000015718 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 14.40%
C000015718 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.30%
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 25.10%
C000015718 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 49.70%
C000015718 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000015718 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 23.80%
C000015718 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000015717 | U.S. Treasury Notes_4.25_2035-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000015717 | U.S. Treasury Notes_4.25_2031-06-30  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000015717 | U.S. Treasury Notes_2.875_2032-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000015717 | U.S. Treasury Notes_4_2032-07-31  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000015717 | U.S. Treasury Notes_4_2030-02-28  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000015717 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000015717 | U.S. Treasury Notes_2.75_2032-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000015717 | U.S. Treasury Notes_3.875_2030-09-30  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000015717 | U.S. Treasury Notes_4_2030-07-31  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000015717 | U.S. Treasury Notes_0.875_2030-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000015717 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015717 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000015717 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000015717 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000015717 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 41.40%
C000015717 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000015717 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000015717 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.20%
C000015717 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000015717 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000015717 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000015717 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 46.90%
C000015717 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000015717 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015717 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 41.70%
C000015717 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000200603 | U.S. Treasury Notes_4.25_2035-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000200603 | U.S. Treasury Notes_4.25_2031-06-30  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000200603 | U.S. Treasury Notes_2.875_2032-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000200603 | U.S. Treasury Notes_4_2032-07-31  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000200603 | U.S. Treasury Notes_4_2030-02-28  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000200603 | U.S. Treasury Notes_4_2034-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000200603 | U.S. Treasury Notes_2.75_2032-08-15  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000200603 | U.S. Treasury Notes_3.875_2030-09-30  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200603 | U.S. Treasury Notes_4_2030-07-31  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000200603 | U.S. Treasury Notes_0.875_2030-11-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000200603 | U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200603 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000200603 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000200603 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 8.00%
C000200603 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 41.40%
C000200603 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000200603 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000200603 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 22.20%
C000200603 | Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000200603 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000200603 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000200603 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 46.90%
C000200603 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000200603 | InvestmentType_U.S. Government & Agencies  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200603 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 41.70%
C000200603 | InvestmentType_Preferred Stocks  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000015716 | U.S. Treasury Notes_2.375_2029-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015716 | Bank of New York Mellon Corp._3.3_2029-08-23_K  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015716 | Bank of America Corp._5.202_2029-04-25  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000015716 | U.S. Treasury Notes_2.625_2029-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000015716 | Starbucks Corp._4.85_2027-02-08  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000015716 | American Express Co._4.351_2029-07-20  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015716 | JPMorgan Chase & Co._3.54_2028-05-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015716 | National Rural Utilities Cooperative Finance Corp. (The)_3.4_2028-02-07  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000015716 | Becton Dickinson & Co._3.7_2027-06-06  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000015716 | Huntington Bancshares, Inc._6.208_2029-08-21  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000015716 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000015716 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000015716 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
C000015716 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
C000015716 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 22.20%
C000015716 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
C000015716 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
C000015716 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000015716 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 22.40%
C000015716 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 61.40%
C000015716 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000015716 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
C000200602 | U.S. Treasury Notes_2.375_2029-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200602 | Bank of New York Mellon Corp._3.3_2029-08-23_K  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200602 | Bank of America Corp._5.202_2029-04-25  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000200602 | U.S. Treasury Notes_2.625_2029-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000200602 | Starbucks Corp._4.85_2027-02-08  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000200602 | American Express Co._4.351_2029-07-20  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200602 | JPMorgan Chase & Co._3.54_2028-05-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200602 | National Rural Utilities Cooperative Finance Corp. (The)_3.4_2028-02-07  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000200602 | Becton Dickinson & Co._3.7_2027-06-06  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000200602 | Huntington Bancshares, Inc._6.208_2029-08-21  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000200602 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000200602 | Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000200602 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 12.80%
C000200602 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 12.10%
C000200602 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 22.20%
C000200602 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 17.60%
C000200602 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 30.40%
C000200602 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000200602 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 22.40%
C000200602 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 61.40%
C000200602 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000200602 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 12.20%
C000229855 | Morgan Stanley_3.591_2028-07-22  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000229855 | U.S. Treasury Bonds_2.25_2041-05-15  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000229855 | Florida Power & Light Co._5.1_2033-04-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000229855 | U.S. Treasury Bonds_2.375_2042-02-15  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000229855 | FNMA_3.5_2050-08-01  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000229855 | PepsiCo, Inc._5_2035-02-07_2020-D  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000229855 | Cisco Systems, Inc._5.05_2034-02-26  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000229855 | Truist Financial Corp._2.25_2030-03-11  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000229855 | U.S. Bancorp_4.967_2033-07-22_BB  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000229855 | FHLMC_4.15_2032-12-15_5616  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000229855 | Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000229855 | Utilities  
Holdings [Line Items]  
Percent of Net Asset Value 8.60%
C000229855 | U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 9.70%
C000229855 | Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 24.30%
C000229855 | Industrials  
Holdings [Line Items]  
Percent of Net Asset Value 28.70%
C000229855 | Finance  
Holdings [Line Items]  
Percent of Net Asset Value 27.30%
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 0.10%
C000229855 | InvestmentType_Collateralized Mortgage Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 24.50%
C000229855 | InvestmentType_Corporate Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 65.30%
C000229855 | InvestmentType_U.S. Treasury Obligations  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
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 2.80%
C000015715 | Ohio State Water Development Authority Revenue_5_2046-06-01_2021  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000015715 | Pennsylvania Economic Development Financing Authority UPMC Revenue_5_2060-03-15_2025-A  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000015715 | Kings LSD Ohio School Improvement_5.25_2054-12-01_2024  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015715 | FHLMC_2.55_2035-06-15_M-053  
Holdings [Line Items]  
Percent of Net Asset Value 1.70%
C000015715 | Bowling Green State University Ohio Revenue_4_2045-06-01_2020-A  
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 | Energy Southeast Alabama Cooperative District Energy Supply Revenue_5.25_2054-07-01_B  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000015715 | Texas Municipal Gas Acquisition and Supply Corp. V Gas Supply Revenue_5_2055-01-01  
Holdings [Line Items]  
Percent of Net Asset Value 1.40%
C000015715 | Black Belt Energy Gas District Alabama Gas Project Revenue Refunding_5.5_2049-06-01_D-1  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000015715 | Florida  
Holdings [Line Items]  
Percent of Total Investments 0.30%
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 0.50%
C000015715 | North Carolina  
Holdings [Line Items]  
Percent of Total Investments 0.60%
C000015715 | Michigan  
Holdings [Line Items]  
Percent of Total Investments 0.70%
C000015715 | Virginia  
Holdings [Line Items]  
Percent of Total Investments 0.80%
C000015715 | Colorado  
Holdings [Line Items]  
Percent of Total Investments 1.50%
C000015715 | Missouri  
Holdings [Line Items]  
Percent of Total Investments 1.90%
C000015715 | Kentucky  
Holdings [Line Items]  
Percent of Total Investments 2.90%
C000015715 | N/A  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000015715 | Pennsylvania  
Holdings [Line Items]  
Percent of Total Investments 3.00%
C000015715 | Indiana  
Holdings [Line Items]  
Percent of Total Investments 4.30%
C000015715 | Alabama  
Holdings [Line Items]  
Percent of Total Investments 5.10%
C000015715 | Texas  
Holdings [Line Items]  
Percent of Total Investments 5.80%
C000015715 | Ohio  
Holdings [Line Items]  
Percent of Total Investments 69.00%
C000015715 | AAA  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000015715 | AA  
Holdings [Line Items]  
Percent of Net Asset Value 50.80%
C000015715 | A  
Holdings [Line Items]  
Percent of Net Asset Value 30.80%
C000015715 | BBB  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000015715 | Not Rated  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000015715 | InvestmentType_Money Market Funds  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000015715 | InvestmentType_Municipal Bonds  
Holdings [Line Items]  
Percent of Net Asset Value 99.60%