75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS link:presentationLink link:calculationLink link:definitionLink 75030 - Disclosure - Plan Description link:presentationLink link:calculationLink link:definitionLink 75040 - Disclosure - Summary of Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Risks and Uncertainties link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Plan Termination link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Tax Status link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Related Party and Party-In-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Summary of Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Schedule of Assets (Held at End of Year) (Tables) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Plan Description - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Summary of Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75170 - Disclosure - Investments - Schedule of Plan's Assets Measured at Fair Value Set Forth by Level, Within Fair Value Hierarchy (Details) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Investments - Schedule of Investments Measured at Fair Value Based on NAV Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Investments - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Tax Status - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75210 - Disclosure - Related Party and Party-In-Interest Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Disclosure - Subsequent Events - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Schedule - Schedule of Assets (Held at End of Year) (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Schedule - Schedule of Assets (Held at End of Year) (Details) [Default] link:presentationLink link:calculationLink link:definitionLink Employee Benefit Plan, Redemption Notice Period Employee benefit plan, redemption notice period. Redemption Notice Period Redemption notice period EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefit distributions EBP, Related Party and Party-in-Interest Transactions [Line Items] Document Fiscal Period Focus EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Forfeitures used to fund company's matching obligation EBP, Tax Status [Abstract] EBP, Forfeited Nonvested Account Forfeiture balance EBP, Description of Plan [Text Block] Plan Description Investment, Identifier [Axis] Employee Benefit Plan, Risk and Uncertainty [Line Items] Line items represent employee benefit plan, risk and uncertainty. EBP, Description of Plan [Line Items] Matching percentage EBP, Employer Contribution, Matching Percentage EBP, Investment, Issuer Name [Extensible Enumeration] Investment issuer name EBP, Investment, Fair Value and NAV [Abstract] Unfunded Commitments Employee Benefit Plan, Unfunded Commitments Employee benefit plan, unfunded commitments. Employee Benefit Plan, Nonvested Benefits Remaining After Termination of Employment, Terms Employee benefit plan, nonvested benefits remaining after termination of employment, terms. Nonvested benefits remaining after termination of employment, terms EBP, Accounting Policy [Line Items] EBP, Schedule of Asset Held for Investment [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] Administrative Expenses and Revenue Credit Account Employee Benefit Plan, Administrative Expenses and Revenue Credit Account [Policy Text Block] Disclosure of accounting policy for employee benefit plan, administrative expenses and revenue credit account. Schedule of Assets (Held at End of Year) Employee Benefit Plan Schedule of Assets Held at End of Year [Text Block] Employee benefit plan schedule of assets held at end of year. Maximum amount participants may borrow EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Collective Trust Measured at NAV Common Collective Trust [Member] Collective Trusts Amendment Flag EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total Employer EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions from net assets attributed to: EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Minimum amount participants may borrow EBP, Payment to Participant [Policy Text Block] Payment of Benefits Employee Benefit Plan, Defined Contribution Plan, Minimum Age Eligibility Employee benefit plan, defined contribution plan, minimum age eligibility. Defined contribution plan, minimum age eligibility Employee Benefit Plan, Fidelity Pre-Approved Defined Contribution Plan Adopted Date Employee benefit plan, Fidelity pre-approved defined contribution plan adopted date. Pre-approved plan adopted date EBP, Schedule of Asset Held for Investment [Line Items] Fair Value Hierarchy and NAV [Axis] EBP, Investment, Current Value, Type [Extensible Enumeration] Investment type Investment Type [Axis] Document Type Entity Central Index Key EBP, Self-Directed Brokerage Account [Member] Self-Directed Brokerage Account Investments EBP, Investment [Policy Text Block] Employee Benefit Plan, Redemption Frequency Employee benefit plan, redemption frequency. Redemption Frequency (if currently eligible) EBP, Subsequent Event [Table] EBP, Accounting Policy [Table] EBP, Subsequent Event [Abstract] EBP, Basis of Accounting [Policy Text Block] Basis of Accounting EBP, Description of Plan [Table] Employee Benefit Plan, Vesting Methodology Description Employee benefit plan, vesting methodology description. Vesting methodology, description Employee Benefit Plan, Withdrawals Notice Period Employee benefit plan, withdrawals notice period. Withdrawals notice period EBP, Employer, Common Stock [Member] Common Stock Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total EBP, Investment, Excluding Plan Interest in Master Trust, Cost Participant loans, cost EBP, Investment, Number of Shares Employee benefit plan, investment, number of shares Minimum [Member] Minimum EBP, Related Party and Party-in-Interest Transactions [Text Block] Related Party and Party-In-Interest Transactions EBP, Change in Net Asset Available for Benefit, Increase Total additions Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment [Abstract] Additions to net assets attributed to: EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Investment participation status EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions: EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Total Total investments Fair Value Investments, at fair value (Note 5) EBP, Use of Estimate [Policy Text Block] Use of Estimates Mutual Fund [Member] Mutual Funds Entity [Domain] Summary of Accounting Policies EBP, Summary of Accounting Policy [Text Block] EBP, Investment, Fair Value and NAV [Text Block] Investments Employee Benefit Plan, Investment, Common Stock, Net Assets Available for Benefits, Percentage Employee benefit plan, investment, common stock, net assets available for benefits, percentage. Employee benefit plan, investment, common stock, net assets available for benefits, percentage EBP, Description of Plan and Accounting Change [Abstract] Participant loans EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statistical Measurement [Domain] Notes receivable from participants EBP, Note Receivable from Participant Document Period End Date Fair Value Hierarchy and NAV [Domain] Maximum percentage of amount participants may borrow EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Plan Termination [Text Block] Plan Termination EBP, Subsequent Event [Text Block] Subsequent Events Employee Benefit Plan, Risk and Uncertainty [Table] Employee benefit plan, risk and uncertainty. Employee Benefit Plan Investments Employee benefit plan investments. Employee benefit plan, investments Cover [Abstract] Investments [Domain] Beginning of year EBP, Net Asset Available for Benefit EBP, Net Asset Available for Benefit, Total End of year EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of Plan's Assets at Fair Value and Investments Measured at Fair Value Based on NAV Per Share Net assets available for benefits: EBP, Net Asset Available for Benefit [Abstract] EBP, Schedule of Asset Held for Investment [Abstract] Employee benefit plan, catch-up contributions Employee Benefit Plan, Catch-up Contributions Employee benefit plan, catch-up contributions. Employee Benefit Plan Risk And Uncertainty [Abstract] Employee benefit plan risk and uncertainty. Investments, Current Value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Notes Receivable from Participants EBP, Note Receivable from Participant [Policy Text Block] EBP 002 [Member] EBP 002. EBP 002 EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule of Assets (Held at End of Year) EBP, Statement of Net Asset Available for Benefit [Table] Document Fiscal Year Focus Net appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total EBP, Employer Contribution, Participant Compensation Matched, Percentage Maximum compensation percentage EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Asset Net assets available for benefits EBP, Contribution [Policy Text Block] Contributions EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Contribution limit EBP, Plan Number Plan number EBP, Investment, Fair Value and NAV [Line Items] Legal Entity [Axis] EBP, Investment, Fair Value and NAV [Table] Employee Benefit Plan, Participant Revenue Credits Employee benefit plan, participant revenue credits. Participant revenue credits, amount allocated EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] EBP, Asset Held for Investment Total EBP, Subsequent Event [Line Items] Tax Status EBP, Tax Status [Text Block] Maximum Maximum [Member] Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Vesting schedule, description Employee Benefit Plan, Vesting in Employer Contributions Schedule Description Employee benefit plan, vesting in employer contributions schedule description. Entity Registrant Name Employee Benefit Plan, Number of Collective Trust Investments Employee benefit plan, number of collective trust investments. Number of collective trust investments Participant loans, interest rates EBP, Asset Held for Investment, Participant Loan, Interest Rate EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Axis] Employee Benefit Plan Wages For Catch-up Contributions Employee benefit plan wages for catch-up contributions. Employee benefit plan, wages for catch-up contributions Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Employee Benefit Plan, Fair Value Measurements [Policy Text Block] Disclosure of accounting policy for employee benefit plan, fair value measurements. Fair Value Measurements EBP, Change in Net Asset Available for Benefit, Decrease Total deductions Employee Benefit Plan Notes Receivable From Participants Loan to Purchase Principal Residence Term Employee benefit plan, notes receivable from participants loan to purchase principal residence term. Participants loan to purchase principal residence, term Fair Value, Inputs, Level 1 [Member] Level 1 Fidelity Managed Income Portfolio Fund [Member] Fidelity Managed Income Portfolio Fund. MIP EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Total Participants Fidelity Growth Company Commingled Pool [Member] Fidelity Growth Company Commingled Pool. Growth Co. Pool EBP, Tax Status [Line Items] Entity Tax Identification Number EIN Loan terms Employee Benefit Plan, Notes Receivable from Participants Loan Terms Employee benefit plan, notes receivable from participants loan terms. EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase EBP, Tax Status [Table] EBP, Asset Held for Investment, Party-in-Interest [true false] Investment party-in-interest Fidelity Freedom Fund 2030 [Member] Vanguard Total Int'l Stock Index Fund. Fidelity Freedom Fund 2030. Cohen and Steers Rlty Shares, Inc. Fund [Member] Vanguard CR Fed MM ADM [Member] Fidelity Freedom Fund 2050. Fidelity Freedom Fund 2055 [Member] PIMCO RAE US SM 1. Fidelity Freedom Fund 2055. Fidelity Extended Market Index Fund. American Funds Amer. Mutual R6 Fund. Fidelity Freedom Fund 2050 [Member] Vanguard CR Fed MM ADM [Member] Fidelity Growth Co. Commingled Pool. Fidelity Blue Chip Growth Fund [Member] Fidelity Low-Priced Stock Fund [Member] AS Special Mid Cap Val R6. Fidelity Freedom Fund 2010 [Member] Fidelity Extended Market Index Fund [Member] Baron Growth Inst Fund. Conestoga Small Cap Fund [Member] Fidelity Freedom Fund 2025 [Member] Baird Core Plus Bond Inst. Fund. Fidelity Inflation Prot. Bond Index Fund [Member] Fidelity Freedom Fund 2045. Vanguard Total Int'l Stock Index Fund [Member] Fidelity Total Bond K6 [Member] Fidelity Freedom Fund 2025. Fidelity Low-Priced Stock Fund. Fidelity 500 Index Inst. Fund. Fidelity 500 Index Inst. Fund [Member] Baird Core Plus Bond Inst. Fund [Member] Fidelity Int'l Capital Appreciation Fund [Member] Fidelity U.S. Bond Index Fund. Fidelity U.S. Bond Index Fund [Member] Conestoga Small Cap Fund. Fidelity Freedom Fund 2040. Fidelity Freedom Fund 2035 [Member] MBIA Inc. Fidelity Freedom Fund 2015 [Member] Fidelity Freedom Retire K Fund. Fidelity Freedom Fund 2040 [Member] Fidelity Managed Retire 2030 K6 [Member] Fidelity Managed Income Portfolio [Member] Fidelity Managed Retire 2030 K6. PIMCO RAE US SM 1 [Member] Fidelity Freedom Fund 2045 [Member] PIMCO High Yield Institutional Fund [Member] Fidelity Freedom Fund 2020 [Member] Fidelity Managed Income Portfolio. Fidelity Inflation Prot. Bond Index Fund. Fidelity Puritan Fund. Fidelity Blue Chip Growth Fund. AS Special Mid Cap Val R6 [Member] Fidelity Managed Retirement 2025 K6 [Member] Baron Asset Inst Fund [Member] Fidelity Growth Co. Commingled Pool [Member] Fidelity Freedom Fund 2010. American Funds Amer. Mutual R6 Fund [Member] Fidelity Freedom Retire K Fund [Member] Fidelity Int'l Capital Appreciation Fund. Cohen and Steers Rlty Shares, Inc. Fund. Baron Asset Inst Fund. Fidelity Total Bond K6. MBIA Inc. [Member] PIMCO High Yield Institutional Fund. Fidelity Freedom Fund 2020. Fidelity Freedom Fund 2035. Fidelity Freedom Fund 2015. Baron Growth Inst Fund [Member] Fidelity Puritan Fund [Member] Fidelity Managed Retirement 2025 K6. MBIA Inc. [Member]