XML 104 R86.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Retirement Benefit Plans (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Interest credit under cash balance plan | 0.030 |  |
Employer matching contribution, percent of match, maximum | 5.00% |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 68,925,000 | $ 59,837,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 59,837,000 |  |
Fair Value of Plan Assets, End of Period | 68,925,000 | 59,837,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 68,925,000 | $ 59,837,000 |
Percent of Total | 100.00% | 100.00% |
Expected Future Benefit Payments |  |  |
Health Care Cost Trend Rate Assumed for Next Year | 7.00% | 7.00% |
Rate to which the Cost Trend Rate is Assumed to Decline (the Ultimate Trend Rate) | 3.78% | 3.78% |
Year that the Rate Reaches the Ultimate Trend Rate | 2075 | 2075 |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 68,925,000 | $ 59,837,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 59,837,000 |  |
Fair Value of Plan Assets, End of Period | 68,925,000 | 59,837,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 68,925,000 | 59,837,000 |
Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Cash |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 0 | $ 0 |
Percent of Total | 0.00% | 0.00% |
Cash | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 0 | $ 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Cash | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Cash | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Interest-Bearing Money Market Fund |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 2,439,000 | 1,124,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 1,124,000 |  |
Fair Value of Plan Assets, End of Period | 2,439,000 | 1,124,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 2,439,000 | $ 1,124,000 |
Percent of Total | 3.50% | 1.90% |
Interest-Bearing Money Market Fund | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 2,439,000 | $ 1,124,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 1,124,000 |  |
Fair Value of Plan Assets, End of Period | 2,439,000 | 1,124,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 2,439,000 | 1,124,000 |
Interest-Bearing Money Market Fund | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Interest-Bearing Money Market Fund | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Common Stock |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 6,469,000 | 5,332,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 5,332,000 |  |
Fair Value of Plan Assets, End of Period | 6,469,000 | 5,332,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 6,469,000 | $ 5,332,000 |
Percent of Total | 9.40% | 8.90% |
Common Stock | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 6,469,000 | $ 5,332,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 5,332,000 |  |
Fair Value of Plan Assets, End of Period | 6,469,000 | 5,332,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 6,469,000 | 5,332,000 |
Common Stock | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Common Stock | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
North Country Funds - Equity |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 29,490,000 | 25,741,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 25,741,000 |  |
Fair Value of Plan Assets, End of Period | 29,490,000 | 25,741,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 29,490,000 | $ 25,741,000 |
Percent of Total | 42.80% | 43.00% |
North Country Funds - Equity | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 29,490,000 | $ 25,741,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 25,741,000 |  |
Fair Value of Plan Assets, End of Period | 29,490,000 | 25,741,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 29,490,000 | 25,741,000 |
North Country Funds - Equity | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
North Country Funds - Equity | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Other Mutual Funds - Equity |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 16,761,000 | 17,336,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 17,336,000 |  |
Fair Value of Plan Assets, End of Period | 16,761,000 | 17,336,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 16,761,000 | $ 17,336,000 |
Percent of Total | 24.30% | 29.00% |
Other Mutual Funds - Equity | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 16,761,000 | $ 17,336,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 17,336,000 |  |
Fair Value of Plan Assets, End of Period | 16,761,000 | 17,336,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 16,761,000 | 17,336,000 |
Other Mutual Funds - Equity | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Other Mutual Funds - Equity | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Equity Funds |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 46,251,000 | 43,077,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 43,077,000 |  |
Fair Value of Plan Assets, End of Period | 46,251,000 | 43,077,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 46,251,000 | $ 43,077,000 |
Percent of Total | 67.10% | 72.00% |
Equity Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 46,251,000 | $ 43,077,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 43,077,000 |  |
Fair Value of Plan Assets, End of Period | 46,251,000 | 43,077,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 46,251,000 | 43,077,000 |
Equity Funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Equity Funds | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
North Country Funds - Fixed Income |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 6,317,000 | 8,534,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 8,534,000 |  |
Fair Value of Plan Assets, End of Period | 6,317,000 | 8,534,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 6,317,000 | $ 8,534,000 |
Percent of Total | 9.20% | 14.30% |
North Country Funds - Fixed Income | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 6,317,000 | $ 8,534,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 8,534,000 |  |
Fair Value of Plan Assets, End of Period | 6,317,000 | 8,534,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 6,317,000 | 8,534,000 |
North Country Funds - Fixed Income | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
North Country Funds - Fixed Income | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Other Mutual Funds - Fixed Income |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 2,675,000 | 805,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 805,000 |  |
Fair Value of Plan Assets, End of Period | 2,675,000 | 805,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 2,675,000 | $ 805,000 |
Percent of Total | 3.90% | 1.30% |
Other Mutual Funds - Fixed Income | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 2,675,000 | $ 805,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 805,000 |  |
Fair Value of Plan Assets, End of Period | 2,675,000 | 805,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 2,675,000 | 805,000 |
Other Mutual Funds - Fixed Income | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Other Mutual Funds - Fixed Income | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Fixed Income Funds |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 8,992,000 | 9,339,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 9,339,000 |  |
Fair Value of Plan Assets, End of Period | 8,992,000 | 9,339,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 8,992,000 | $ 9,339,000 |
Percent of Total | 13.10% | 15.60% |
Fixed Income Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 8,992,000 | $ 9,339,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 9,339,000 |  |
Fair Value of Plan Assets, End of Period | 8,992,000 | 9,339,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 8,992,000 | 9,339,000 |
Fixed Income Funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Fixed Income Funds | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Alternative ETF |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 4,774,000 | 965,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 965,000 |  |
Fair Value of Plan Assets, End of Period | 4,774,000 | 965,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 4,774,000 | $ 965,000 |
Percent of Total | 6.90% | 1.60% |
Alternative ETF | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 4,774,000 | $ 965,000 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 965,000 |  |
Fair Value of Plan Assets, End of Period | 4,774,000 | 965,000 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 4,774,000 | 965,000 |
Alternative ETF | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | 0 | 0 |
Alternative ETF | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 |
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 |  |
Fair Value of Plan Assets, End of Period | 0 | 0 |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Fair Value of Plan Assets | $ 0 | 0 |
Employees' Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account | 1.02% |  |
Defined benefit plan, increase in benefit payable, percent | 3.00% |  |
Defined benefit plan, benefit obligation, increase (decrease) for plan amendment | $ 0 | 351,638 |
Defined benefit plan, amortization of service cost | 9 years 8 months 12 days |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | $ 68,925,000 | 59,837,000 | $ 57,051,000
Benefit Obligation | 45,659,000 | 44,877,000 | 42,322,000
Funded Status of Plan | 23,266,000 | 14,960,000 |
Change in Benefit Obligation |  |  |
Benefit Obligation, Beginning of Period | 44,877,000 | 42,322,000 |
Service Cost | 1,934,000 | 1,663,000 | 1,527,000
Interest Cost | 1,365,000 | 1,544,000 | 1,765,000
Plan Participants' Contributions | 0 | 0 |
Amendments | 0 | 351,638 |
Actuarial (Gain) Loss | (347,000) | 2,901,000 |
Benefits Paid | (2,170,000) | (3,905,000) |
Benefit Obligation, End of Period | 45,659,000 | 44,877,000 | 42,322,000
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 59,837,000 | 57,051,000 |
Actual Return on Plan Assets | 11,258,000 | 6,691,000 |
Employer Contributions | 0 | 0 |
Plan Participants' Contributions | 0 | 0 |
Benefits Paid | (2,170,000) | (3,905,000) |
Fair Value of Plan Assets, End of Period | 68,925,000 | 59,837,000 | 57,051,000
Accumulated Benefit Obligation at December 31, 2021 | 45,482,000 |  |
Amounts Recognized in the Consolidated Balance Sheets |  |  |
Prepaid Pension Asset | 23,266,000 | 14,960,000 |
Accrued Benefit Liability | 0 | 0 |
Net Benefit (Expense) Recognized | 23,266,000 | 14,960,000 |
Amounts Recognized in Other Comprehensive Income (Loss) |  |  |
Net Unamortized (Gain) Loss Arising During the Period | (7,826,000) | (182,000) | (4,584,000)
Net Prior Service Cost Arising During the Period |  | 349,000 |
Amortization of Net (Loss) Gain | 0 | (81,000) | (613,000)
Amortization of Prior Service Cost | (78,000) | (63,000) | (69,000)
Total Other Comprehensive (Loss) Income for Pension and Other Postretirement Benefit Plans | (7,904,000) | 23,000 | (5,266,000)
Accumulated Other Comprehensive Income |  |  |
Net Actuarial (Gain) Loss | (2,341,000) | 5,482,000 |
Prior Service Cost | 453,000 | 533,000 |
Total Accumulated Other Comprehensive (Loss) Income, Before Tax | (1,888,000) | 6,015,000 |
Amounts that will be Amortized from Accumulated Other Comprehensive Income the Next Year |  |  |
Net Actuarial Loss (Gain) | 0 |  |
Prior Service Cost | 77,000 |  |
Net Periodic Benefit Cost |  |  |
Service Cost | 1,934,000 | 1,663,000 | 1,527,000
Interest Cost | 1,365,000 | 1,544,000 | 1,765,000
Expected Return on Plan Assets | (3,780,000) | (3,608,000) | (3,060,000)
Amortization of Prior Service Cost | 78,000 | 63,000 | 69,000
Amortization of Net Loss (Gain) | 0 | 81,000 | 613,000
Net Periodic Benefit Cost | $ (403,000) | $ (257,000) | $ 914,000
Weighted-Average Assumptions Used in Calculating Benefit Obligation |  |  |
Discount Rate | 3.30% | 3.14% |
Rate of Compensation Increase | 3.50% | 3.50% |
Interest Rate Credit for Determining Projected Cash Balance Account | 3.00% | 3.00% |
Interest Rate Credit for Determining Projected Cash Balance Account, Segment One | 1.02% |  |
Interest Rate Credit for Determining Projected Cash Balance Account, Segment Two | 2.72% |  |
Interest Rate Credit for Determining Projected Cash Balance Account, Segment Three | 3.08% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment One | 1.02% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Two | 2.72% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Three | 3.08% |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Discount Rate | 3.14% | 3.72% | 4.81%
Expected Long-Term Return on Plan Assets | 6.50% | 6.50% | 6.50%
Rate of Compensation Increase | 3.50% | 3.50% | 3.50%
Interest Rate Credit for Determining Projected Cash Balance Account | 3.00% | 3.00% | 3.00%
Interest Rate to Annuitize Cash Balance Account, Segment One | 1.02% |  |
Interest Rate to Annuitize Cash Balance Account, Segment Two | 2.72% |  |
Interest Rate to Annuitize Cash Balance Account, Segment Three | 3.08% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment One | 1.02% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Two | 2.72% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Three | 3.08% |  |
Fair Value of Plan Assets | $ 68,925,000 | $ 59,837,000 | $ 57,051,000
Expected Future Benefit Payments |  |  |
2022 | 2,666,000 |  |
2023 | 3,329,000 |  |
2024 | 3,106,000 |  |
2025 | 3,474,000 |  |
2026 | 2,699,000 |  |
2027 - 2031 | 15,040,000 |  |
Estimated Contributions During 2022 | $ 0 |  |
Select Executive Retirement Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account | 2.72% |  |
Defined benefit plan, benefit obligation, increase (decrease) for plan amendment | $ 0 | 122,000 |
Defined benefit plan, amortization of service cost | 12 years 6 months |  |
Defined benefit plan, benefit obligation, period increase (decrease) | $ 122,797 |  |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 | 0
Benefit Obligation | 6,455,000 | 5,820,000 | 5,194,000
Funded Status of Plan | (6,455,000) | (5,820,000) |
Change in Benefit Obligation |  |  |
Benefit Obligation, Beginning of Period | 5,820,000 | 5,194,000 |
Service Cost | 582,000 | 408,000 | 324,000
Interest Cost | 191,000 | 192,000 | 217,000
Plan Participants' Contributions | 0 | 0 |
Amendments | 0 | 122,000 |
Actuarial (Gain) Loss | 332,000 | 369,000 |
Benefits Paid | (470,000) | (465,000) |
Benefit Obligation, End of Period | 6,455,000 | 5,820,000 | 5,194,000
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 | 0 |
Actual Return on Plan Assets | 0 | 0 |
Employer Contributions | 470,000 | 465,000 |
Plan Participants' Contributions | 0 | 0 |
Benefits Paid | (470,000) | (465,000) |
Fair Value of Plan Assets, End of Period | 0 | 0 | 0
Accumulated Benefit Obligation at December 31, 2021 | 6,384,000 |  |
Amounts Recognized in the Consolidated Balance Sheets |  |  |
Prepaid Pension Asset | 0 | 0 |
Accrued Benefit Liability | (6,455,000) | (5,820,000) |
Net Benefit (Expense) Recognized | (6,455,000) | (5,820,000) |
Amounts Recognized in Other Comprehensive Income (Loss) |  |  |
Net Unamortized (Gain) Loss Arising During the Period | 332,000 | 368,000 | 409,000
Net Prior Service Cost Arising During the Period |  | 123,000 |
Amortization of Net (Loss) Gain | (178,000) | (146,000) | (113,000)
Amortization of Prior Service Cost | (48,000) | (42,000) | (54,000)
Total Other Comprehensive (Loss) Income for Pension and Other Postretirement Benefit Plans | 106,000 | 303,000 | 242,000
Accumulated Other Comprehensive Income |  |  |
Net Actuarial (Gain) Loss | 2,651,000 | 2,497,000 |
Prior Service Cost | 411,000 | 459,000 |
Total Accumulated Other Comprehensive (Loss) Income, Before Tax | 3,062,000 | 2,956,000 |
Amounts that will be Amortized from Accumulated Other Comprehensive Income the Next Year |  |  |
Net Actuarial Loss (Gain) | 157,000 |  |
Prior Service Cost | 44,000 |  |
Net Periodic Benefit Cost |  |  |
Service Cost | 582,000 | 408,000 | 324,000
Interest Cost | 191,000 | 192,000 | 217,000
Expected Return on Plan Assets | 0 | 0 | 0
Amortization of Prior Service Cost | 48,000 | 42,000 | 54,000
Amortization of Net Loss (Gain) | 179,000 | 146,000 | 113,000
Net Periodic Benefit Cost | $ 1,000,000 | $ 788,000 | $ 708,000
Weighted-Average Assumptions Used in Calculating Benefit Obligation |  |  |
Discount Rate | 3.29% | 3.19% |
Rate of Compensation Increase | 3.50% | 3.50% |
Interest Rate Credit for Determining Projected Cash Balance Account | 3.00% | 3.00% |
Interest Rate Credit for Determining Projected Cash Balance Account, Segment One | 1.02% |  |
Interest Rate Credit for Determining Projected Cash Balance Account, Segment Two | 2.72% |  |
Interest Rate Credit for Determining Projected Cash Balance Account, Segment Three | 3.08% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment One | 1.02% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Two | 2.72% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Three | 3.08% |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Discount Rate | 3.19% | 3.75% | 4.80%
Rate of Compensation Increase | 3.50% | 3.50% | 3.50%
Interest Rate Credit for Determining Projected Cash Balance Account | 3.00% | 3.00% | 3.00%
Interest Rate to Annuitize Cash Balance Account, Segment One | 1.02% |  |
Interest Rate to Annuitize Cash Balance Account, Segment Two | 2.72% |  |
Interest Rate to Annuitize Cash Balance Account, Segment Three | 3.08% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment One | 1.02% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Two | 2.72% |  |
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Three | 3.08% |  |
Fair Value of Plan Assets | $ 0 | $ 0 | $ 0
Expected Future Benefit Payments |  |  |
2022 | 445,000 |  |
2023 | 424,000 |  |
2024 | 630,000 |  |
2025 | 609,000 |  |
2026 | 582,000 |  |
2027 - 2031 | 2,605,000 |  |
Estimated Contributions During 2022 | $ 445,000 |  |
Postretirement Benefit Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account | 3.08% |  |
Defined benefit plan, benefit obligation, increase (decrease) for plan amendment | $ 0 | 0 |
Defined Benefit Plan Funded Status |  |  |
Fair Value of Plan Assets | 0 | 0 | 0
Benefit Obligation | 7,994,000 | 9,028,000 | 8,652,000
Funded Status of Plan | (7,994,000) | (9,028,000) |
Change in Benefit Obligation |  |  |
Benefit Obligation, Beginning of Period | 9,028,000 | 8,652,000 |
Service Cost | 109,000 | 123,000 | 121,000
Interest Cost | 249,000 | 310,000 | 364,000
Plan Participants' Contributions | 432,000 | 454,000 |
Amendments | 0 | 0 |
Actuarial (Gain) Loss | (1,240,000) | 151,000 |
Benefits Paid | (584,000) | (662,000) |
Benefit Obligation, End of Period | 7,994,000 | 9,028,000 | 8,652,000
Change in Fair Value of Plan Assets |  |  |
Fair Value of Plan Assets, Beginning of Period | 0 | 0 |
Actual Return on Plan Assets | 0 | 0 |
Employer Contributions | 152,000 | 208,000 |
Plan Participants' Contributions | 432,000 | 454,000 |
Benefits Paid | (584,000) | (662,000) |
Fair Value of Plan Assets, End of Period | 0 | 0 | 0
Accumulated Benefit Obligation at December 31, 2021 | 7,994,000 |  |
Amounts Recognized in the Consolidated Balance Sheets |  |  |
Prepaid Pension Asset | 0 | 0 |
Accrued Benefit Liability | (7,994,000) | (9,028,000) |
Net Benefit (Expense) Recognized | (7,994,000) | (9,028,000) |
Amounts Recognized in Other Comprehensive Income (Loss) |  |  |
Net Unamortized (Gain) Loss Arising During the Period | (1,239,000) | 151,000 | 670,000
Net Prior Service Cost Arising During the Period |  | 0 |
Amortization of Net (Loss) Gain | 87,000 | 0 | 42,000
Amortization of Prior Service Cost | (106,000) | (106,000) | (101,000)
Total Other Comprehensive (Loss) Income for Pension and Other Postretirement Benefit Plans | (1,258,000) | 45,000 | 611,000
Accumulated Other Comprehensive Income |  |  |
Net Actuarial (Gain) Loss | (1,182,000) | (30,000) |
Prior Service Cost | 472,000 | 578,000 |
Total Accumulated Other Comprehensive (Loss) Income, Before Tax | (710,000) | 548,000 |
Amounts that will be Amortized from Accumulated Other Comprehensive Income the Next Year |  |  |
Net Actuarial Loss (Gain) | (128,000) |  |
Prior Service Cost | 106,000 |  |
Net Periodic Benefit Cost |  |  |
Service Cost | 109,000 | 123,000 | 121,000
Interest Cost | 249,000 | 310,000 | 364,000
Expected Return on Plan Assets | 0 | 0 | 0
Amortization of Prior Service Cost | 106,000 | 106,000 | 101,000
Amortization of Net Loss (Gain) | (88,000) | 0 | (42,000)
Net Periodic Benefit Cost | $ 376,000 | $ 539,000 | $ 544,000
Weighted-Average Assumptions Used in Calculating Benefit Obligation |  |  |
Discount Rate | 3.32% | 3.17% |
Rate of Compensation Increase | 3.50% | 3.50% |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Discount Rate | 3.17% | 3.76% | 4.81%
Rate of Compensation Increase | 3.50% | 3.50% | 3.50%
Fair Value of Plan Assets | $ 0 | $ 0 | $ 0
Expected Future Benefit Payments |  |  |
2022 | 610,000 |  |
2023 | 600,000 |  |
2024 | 607,000 |  |
2025 | 620,000 |  |
2026 | 631,000 |  |
2027 - 2031 | 2,917,000 |  |
Estimated Contributions During 2022 | $ 610,000 |  |
Minimum | Cash |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 0.00% | 0.00% |
Minimum | Interest-Bearing Money Market Fund |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 0.00% | 0.00% |
Minimum | Common Stock |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 0.00% | 0.00% |
Minimum | North Country Funds - Equity |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Minimum | Other Mutual Funds - Equity |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Minimum | Equity Funds |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 55.00% | 55.00% |
Minimum | North Country Funds - Fixed Income |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Minimum | Other Mutual Funds - Fixed Income |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Minimum | Fixed Income Funds |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 10.00% | 10.00% |
Minimum | Alternative ETF |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 0.00% | 0.00% |
Maximum | Cash |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 15.00% | 15.00% |
Maximum | Interest-Bearing Money Market Fund |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 15.00% | 15.00% |
Maximum | Common Stock |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 10.00% | 10.00% |
Maximum | North Country Funds - Equity |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Maximum | Other Mutual Funds - Equity |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Maximum | Equity Funds |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 85.00% | 85.00% |
Maximum | North Country Funds - Fixed Income |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Maximum | Other Mutual Funds - Fixed Income |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage |  |  |
Maximum | Fixed Income Funds |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 30.00% | 30.00% |
Maximum | Alternative ETF |  |  |
Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost |  |  |
Target Allocation, Percentage | 20.00% | 20.00% |
Subsequent to January 1, 2003 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service credits, percent of eligible salaries | 6.00% |  |
Prior to January 1, 2003 | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service credits, percent of eligible salaries | 6.00% |  |
Prior to January 1, 2003 | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service credits, percent of eligible salaries | 12.00% |  |

X
- Definition Cash Balance Service Credits Percent Of Eligible Salaries + References No definition available. + Details
Name: | arow_CashBalanceServiceCreditsPercentOfEligibleSalaries
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Amortization Of Service Cost + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAmortizationOfServiceCost
Namespace Prefix: | arow_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate Credit for Determining Projected Cash Balance Account + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateCreditForDeterminingProjectedCashBalanceAccount
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Annuitize Cash Balance Account + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToAnnuitizeCashBalanceAccount
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Annuitize Cash Balance Account, Segment One + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToAnnuitizeCashBalanceAccountSegmentOne
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Annuitize Cash Balance Account, Segment Three + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToAnnuitizeCashBalanceAccountSegmentThree
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Annuitize Cash Balance Account, Segment Two + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToAnnuitizeCashBalanceAccountSegmentTwo
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment One + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToConvertAnnuitiesToActuariallyEquivalentLumpSumAmountsSegmentOne
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Three + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToConvertAnnuitiesToActuariallyEquivalentLumpSumAmountsSegmentThree
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Two + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestRateToConvertAnnuitiesToActuariallyEquivalentLumpSumAmountsSegmentTwo
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Rate to Annuitize Cash Balance Account, Segment One + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestRateToAnnuitizeCashBalanceAccountSegmentOne
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Rate to Annuitize Cash Balance Account, Segment Three + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestRateToAnnuitizeCashBalanceAccountSegmentThree
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Rate to Annuitize Cash Balance Account, Segment Two + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestRateToAnnuitizeCashBalanceAccountSegmentTwo
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment One + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestRateToConvertAnnuitiesToActuariallyEquivalentLumpSumAmountsSegmentOne
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Three + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestRateToConvertAnnuitiesToActuariallyEquivalentLumpSumAmountsSegmentThree
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Amounts, Segment Two + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestRateToConvertAnnuitiesToActuariallyEquivalentLumpSumAmountsSegmentTwo
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Assumptions Used Calculation Net Periodic Benefit Cost, Interest Rate Credit for Determining Projected Cash Balance Account + References No definition available. + Details
Name: | arow_DefinedBenefitPlanAssumptionsUsedCalculationNetPeriodicBenefitCostInterestRateCreditForDeterminingProjectedCashBalanceAccount
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Expected Amortization Of Gain (Loss), Next Fiscal Year1 + References No definition available. + Details
Name: | arow_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear1
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Defined Benefit Plan, Expected Amortization Of Prior Service Cost (Credit), Next Fiscal Year1 + References No definition available. + Details
Name: | arow_DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear1
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Defined Benefit Plan, Increase In Benefit Payable, Percent + References No definition available. + Details
Name: | arow_DefinedBenefitPlanIncreaseInBenefitPayablePercent
Namespace Prefix: | arow_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Interest Credit Under Cash Balance Plan + References No definition available. + Details
Name: | arow_InterestCreditUnderCashBalancePlan
Namespace Prefix: | arow_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanActuarialGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 + Details
Name: | us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYearAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(10)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1731-114919 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of contributions received by defined benefit plan from participant which increase benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1703-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanFundedStatusOfPlan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost recognized for passage of time related to defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
Name: | us-gaap_DefinedBenefitPlanInterestCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(7) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAmendments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(5) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of contributions received by defined benefit plan from participant which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 + Details
Name: | us-gaap_DefinedBenefitPlanServiceCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Ultimate trend rate for health care cost for defined benefit postretirement plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Year ultimate health care cost trend rate is expected to be reached, in YYYY format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:gYearListItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e640-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e689-108580 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL34724391-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123453770&loc=d3e1731-114919 + Details
Name: | us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_DefinedBenefitPlanCashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arow_NorthCountryFundsEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arow_OtherMutualFundsEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arow_NorthCountryFundsFixedIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=arow_OtherMutualFundsFixedIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_ExchangeTradedFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | arow_ParticipationYearAxis=arow_SubsequenttoJanuary12003Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | arow_ParticipationYearAxis=arow_PriortoJanuary12003Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |