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Retirement Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Employer matching contribution, percent of match, maximum |  | 5.00% |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | $ 53,571 | $ 53,571 |  | $ 48,445 |  | $ 53,571
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 53,571 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 48,445 | 53,571 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | $ 53,571 | $ 53,571 |  | $ 48,445 |  | $ 53,571
Percent of Total |  |  |  |  | 100.00% |  | 100.00%
Expected Future Benefit Payments [Abstract] |  |  |  |  |  |  |
Health Care Cost Trend Rate Assumed for Next Year |  |  |  |  | 7.00% |  | 7.25%
Rate to which the Cost Trend Rate is Assumed to Decline (the Ultimate Trend Rate) |  |  |  |  | 3.78% |  | 3.89%
Year that the Rate Reaches the Ultimate Trend Rate |  | 2075 | 2075 |  |  |  |
Effect of One Percentage Point Increase on Service and Interest Cost Components |  | $ 42 |  |  |  |  |
Effect of One Percentage Point Decrease on Service and Interest Cost Components |  | (36) |  |  |  |  |
Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation |  | 478 |  |  |  |  |
Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation |  | (417) |  |  |  |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 53,571 | $ 53,571 |  | $ 48,445 |  | $ 53,571
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 53,571 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 48,445 | 53,571 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 53,571 | 53,571 |  | 48,445 |  | 53,571
Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Cash |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 22 | 22 |  | 0 |  | 22
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 22 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 22 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 22 | 22 |  | $ 0 |  | $ 22
Percent of Total |  |  |  |  | 0.00% |  | 0.00%
Cash | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 22 | 22 |  | $ 0 |  | $ 22
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 22 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 22 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 22 | 22 |  | 0 |  | 22
Cash | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Cash | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Interest-Bearing Money Market Fund |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 2,682 | 2,682 |  | 3,310 |  | 2,682
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 2,682 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 3,310 | 2,682 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 2,682 | 2,682 |  | $ 3,310 |  | $ 2,682
Percent of Total |  |  |  |  | 6.80% |  | 5.00%
Interest-Bearing Money Market Fund | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 2,682 | 2,682 |  | $ 3,310 |  | $ 2,682
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 2,682 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 3,310 | 2,682 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 2,682 | 2,682 |  | 3,310 |  | 2,682
Interest-Bearing Money Market Fund | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Interest-Bearing Money Market Fund | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Common Stock |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 5,657 | 5,657 |  | 5,381 |  | 5,657
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 5,657 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 5,381 | 5,657 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 5,657 | 5,657 |  | $ 5,381 |  | $ 5,657
Percent of Total |  |  |  |  | 11.10% | [1] | 10.60%
Common Stock | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 5,657 | 5,657 |  | $ 5,381 |  | $ 5,657
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 5,657 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 5,381 | 5,657 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 5,657 | 5,657 |  | 5,381 |  | 5,657
Common Stock | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Common Stock | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
North Country Funds - Equity |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 19,680 | 19,680 |  | 16,629 |  | 19,680
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 19,680 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 16,629 | 19,680 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 19,680 | 19,680 |  | $ 16,629 |  | $ 19,680
Percent of Total | [2] |  |  |  | 34.30% |  | 36.70%
North Country Funds - Equity | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 19,680 | 19,680 |  | $ 16,629 |  | $ 19,680
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 19,680 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 16,629 | 19,680 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 19,680 | 19,680 |  | 16,629 |  | 19,680
North Country Funds - Equity | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
North Country Funds - Equity | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
Other Mutual Funds - Equity |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 15,168 | 15,168 |  | 13,081 |  | 15,168
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 15,168 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 13,081 | 15,168 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 15,168 | 15,168 |  | $ 13,081 |  | $ 15,168
Percent of Total |  |  |  |  | 27.00% |  | 28.30%
Other Mutual Funds - Equity | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 15,168 | 15,168 |  | $ 13,081 |  | $ 15,168
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 15,168 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 13,081 | 15,168 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 15,168 | 15,168 |  | 13,081 |  | 15,168
Other Mutual Funds - Equity | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Other Mutual Funds - Equity | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Equity Funds |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 34,848 | 34,848 |  | 29,710 |  | 34,848
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 34,848 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 29,710 | 34,848 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 34,848 | 34,848 |  | $ 29,710 |  | $ 34,848
Percent of Total |  |  |  |  | 61.30% |  | 65.00%
Equity Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 34,848 | 34,848 |  | $ 29,710 |  | $ 34,848
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 34,848 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 29,710 | 34,848 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 34,848 | 34,848 |  | 29,710 |  | 34,848
Equity Funds | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Equity Funds | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
North Country Funds - Fixed Income |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 8,388 | 8,388 |  | 8,124 |  | 8,388
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 8,388 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 8,124 | 8,388 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 8,388 | 8,388 |  | $ 8,124 |  | $ 8,388
Percent of Total | [2] |  |  |  | 16.80% |  | 15.70%
North Country Funds - Fixed Income | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 8,388 | 8,388 |  | $ 8,124 |  | $ 8,388
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 8,388 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 8,124 | 8,388 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 8,388 | 8,388 |  | 8,124 |  | 8,388
North Country Funds - Fixed Income | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
North Country Funds - Fixed Income | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period | [2] | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period | [2] | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets | [2] | 0 | 0 |  | 0 |  | 0
Other Mutual Funds - Fixed Income |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 1,974 | 1,974 |  | 1,920 |  | 1,974
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 1,974 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 1,920 | 1,974 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 1,974 | 1,974 |  | $ 1,920 |  | $ 1,974
Percent of Total |  |  |  |  | 4.00% |  | 3.70%
Other Mutual Funds - Fixed Income | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 1,974 | 1,974 |  | $ 1,920 |  | $ 1,974
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 1,974 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 1,920 | 1,974 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 1,974 | 1,974 |  | 1,920 |  | 1,974
Other Mutual Funds - Fixed Income | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Other Mutual Funds - Fixed Income | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Fixed Income Funds |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 10,362 | 10,362 |  | 10,044 |  | 10,362
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 10,362 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 10,044 | 10,362 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 10,362 | 10,362 |  | $ 10,044 |  | $ 10,362
Percent of Total |  |  |  |  | 20.80% |  | 19.40%
Fixed Income Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 10,362 | 10,362 |  | $ 10,044 |  | $ 10,362
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 10,362 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 10,044 | 10,362 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 10,362 | 10,362 |  | 10,044 |  | 10,362
Fixed Income Funds | Significant Other Observable Inputs (Level 2) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Fixed Income Funds | Significant Unobservable Inputs (Level 3) |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 |  |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 |  | 0 |  | 0
Employees' Pension Plan |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 53,571 | 50,220 | $ 50,220 | 48,445 |  | 53,571
Benefit Obligation |  | 38,921 | 36,154 | 36,154 | 38,069 |  | 38,921
Funded Status of Plan |  |  |  |  | 10,376 |  | 14,650
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |  |  |
Benefit Obligation, Beginning of Period |  | 38,921 | 36,154 |  |  |  |
Service Cost |  | 1,557 | 1,392 | 1,400 |  |  |
Interest Cost |  | 1,598 | 1,682 | 1,641 |  |  |
Plan Participants' Contributions |  | 0 | 0 |  |  |  |
Amendments |  | 0 | 0 |  |  |  |
Actuarial Loss |  | (795) | 2,440 |  |  |  |
Benefits Paid |  | (3,212) | (2,747) |  |  |  |
Benefit Obligation, End of Period |  | 38,069 | 38,921 | 36,154 |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 53,571 | 50,220 |  |  |  |
Actual Return on Plan Assets |  | (1,914) | 6,098 |  |  |  |
Employer Contributions |  | 0 | 0 |  |  |  |
Plan Participants' Contributions |  | 0 | 0 |  |  |  |
Benefits Paid |  | (3,212) | (2,747) |  |  |  |
Fair Value of Plan Assets, End of Period |  | 48,445 | 53,571 | 50,220 |  |  |
Accumulated Benefit Obligation at December 31, 2012 |  |  |  |  | 37,749 |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |  |  |  |  |
Prepaid Benefit Cost |  |  |  |  | 10,376 |  | 14,650
Accrued Benefit Liability |  |  |  |  | 0 |  | 0
Net Benefit Cost Recognized |  |  |  |  | 10,376 |  | 14,650
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |
Net Retirement Plan Loss, Before-Tax Amount |  | 4,480 | (517) | (2,657) |  |  |
Net prior Service Cost Arising During the Period |  | 0 | 0 | 0 |  |  |
Amortization of Net Loss |  | (194) | (306) | (591) |  |  |
Accretion of Net Retirement Plan Prior Service Credit, Tax (Expense) Benefit |  | 49 | 57 | 57 |  |  |
Total Other Comprehensive (Loss) Income for Pension and Other Postretirement Benefit Plans |  | 4,335 | (766) | (3,191) |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |  |  |  |  |
Net Actuarial Loss |  |  |  |  | 10,942 |  | 6,656
Prior Service (Credit) Cost |  |  |  |  | 313 |  | 264
Total Accumulated Other Comprehensive Income, Before Tax |  |  |  |  | 11,255 |  | $ 6,920
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract] |  |  |  |  |  |  |
Net Actuarial Loss |  |  |  |  | 612 |  |
Prior Service (Credit) Cost |  |  |  |  | $ 69 |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |  |  |  |  |
Service Cost |  | 1,557 | 1,392 | 1,400 |  |  |
Interest Cost |  | 1,598 | 1,682 | 1,641 |  |  |
Expected Return on Plan Assets |  | (3,362) | (3,141) | (3,198) |  |  |
Amortization of Prior Service (Credit) Cost |  | (49) | (57) | (57) |  |  |
Amortization of Net Loss |  | 194 | 306 | 591 |  |  |
Net Periodic Benefit Cost |  | $ (62) | $ 182 | $ 377 |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |  |  |  |  |
Discount Rate |  |  |  |  | 4.81% |  | 4.24%
Rate of Compensation Increase |  |  |  |  | 3.50% |  | 3.50%
Interest Rate Credit for Determining Projected Cash Balance Account |  |  |  |  | 3.36% |  | 3.00%
Interest Rate to Annuitize Cash Balance Account |  |  |  |  | 3.43% |  | 4.25%
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Account |  |  |  |  |  |  | 4.25%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Discount Rate |  | 4.24% | 4.83% | 4.73% |  |  |
Expected Long-Term Return on Assets |  | 6.50% | 6.50% | 7.00% |  |  |
Rate of Compensation Increase |  | 3.50% | 3.50% | 3.50% |  |  |
Interest Rate Credit for Determining Projected Cash Balance Account |  | 3.00% | 3.00% | 3.03% |  |  |
Interest Rate to Annuitize Cash Balance Account |  |  | 4.50% | 5.00% |  |  |
Interest Rate to Convert Accuities to Actuarially Equivalent Lump Sum Amounts |  |  | 4.50% | 5.00% |  |  |
Fair Value of Plan Assets |  | $ 53,571 | $ 50,220 | $ 50,220 | $ 48,445 |  | $ 53,571
Expected Future Benefit Payments [Abstract] |  |  |  |  |  |  |
2019 |  |  |  |  | 2,223 |  |
2020 |  |  |  |  | 2,792 |  |
2021 |  |  |  |  | 2,513 |  |
2022 |  |  |  |  | 2,756 |  |
2023 |  |  |  |  | 2,781 |  |
2022- 2026 |  |  |  |  | 15,162 |  |
Estimated Contributions During 2015 |  |  |  |  | 0 |  |
Select Executive Retirement Plan |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 | 0 | 0 |  | 0
Benefit Obligation |  | 4,586 | 4,547 | 4,547 | 4,710 |  | 4,586
Funded Status of Plan |  |  |  |  | (4,710) |  | (4,586)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |  |  |
Benefit Obligation, Beginning of Period |  | 4,586 | 4,547 |  |  |  |
Service Cost |  | 414 | 45 | 40 |  |  |
Interest Cost |  | 192 | 209 | 206 |  |  |
Plan Participants' Contributions |  | 0 | 0 |  |  |  |
Amendments |  | 0 | 0 |  |  |  |
Actuarial Loss |  | (17) | 245 |  |  |  |
Benefits Paid |  | (465) | (460) |  |  |  |
Benefit Obligation, End of Period |  | 4,710 | 4,586 | 4,547 |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 | 0 |  |  |  |
Actual Return on Plan Assets |  | 0 | 0 |  |  |  |
Employer Contributions |  | 465 | 460 |  |  |  |
Plan Participants' Contributions |  | 0 | 0 |  |  |  |
Benefits Paid |  | (465) | (460) |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 | 0 |  |  |
Accumulated Benefit Obligation at December 31, 2012 |  |  |  |  | 4,672 |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |  |  |  |  |
Prepaid Benefit Cost |  |  |  |  | 0 |  | 0
Accrued Benefit Liability |  |  |  |  | (4,710) |  | (4,586)
Net Benefit Cost Recognized |  |  |  |  | (4,710) |  | (4,586)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |
Net Retirement Plan Loss, Before-Tax Amount |  | (17) | 244 | (32) |  |  |
Net prior Service Cost Arising During the Period |  | 0 | 0 | 0 |  |  |
Amortization of Net Loss |  | (131) | (129) | (125) |  |  |
Accretion of Net Retirement Plan Prior Service Credit, Tax (Expense) Benefit |  | (57) | (57) | (57) |  |  |
Total Other Comprehensive (Loss) Income for Pension and Other Postretirement Benefit Plans |  | (205) | 58 | (214) |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |  |  |  |  |
Net Actuarial Loss |  |  |  |  | 1,979 |  | 2,127
Prior Service (Credit) Cost |  |  |  |  | 432 |  | 489
Total Accumulated Other Comprehensive Income, Before Tax |  |  |  |  | 2,411 |  | $ 2,616
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract] |  |  |  |  |  |  |
Net Actuarial Loss |  |  |  |  | 106 |  |
Prior Service (Credit) Cost |  |  |  |  | $ 54 |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |  |  |  |  |
Service Cost |  | 414 | 45 | 40 |  |  |
Interest Cost |  | 192 | 209 | 206 |  |  |
Expected Return on Plan Assets |  | 0 | 0 | 0 |  |  |
Amortization of Prior Service (Credit) Cost |  | 57 | 57 | 57 |  |  |
Amortization of Net Loss |  | 131 | 129 | 125 |  |  |
Net Periodic Benefit Cost |  | $ 794 | $ 440 | $ 428 |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |  |  |  |  |
Discount Rate |  |  |  |  | 4.80% |  | 4.18%
Rate of Compensation Increase |  |  |  |  | 3.50% |  | 3.50%
Interest Rate Credit for Determining Projected Cash Balance Account |  |  |  |  | 3.36% |  | 3.00%
Interest Rate to Annuitize Cash Balance Account |  |  |  |  | 4.46% |  | 4.25%
Interest Rate to Convert Annuities to Actuarially Equivalent Lump Sum Account |  |  |  |  |  |  | 4.25%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Discount Rate |  | 4.18% | 4.73% | 4.61% |  |  |
Rate of Compensation Increase |  | 3.50% | 3.50% | 3.50% |  |  |
Interest Rate Credit for Determining Projected Cash Balance Account |  | 3.00% | 3.00% | 3.03% |  |  |
Interest Rate to Annuitize Cash Balance Account |  |  | 4.50% | 5.00% |  |  |
Interest Rate to Convert Accuities to Actuarially Equivalent Lump Sum Amounts |  |  | 4.50% | 5.00% |  |  |
Fair Value of Plan Assets |  | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0
Expected Future Benefit Payments [Abstract] |  |  |  |  |  |  |
2019 |  |  |  |  | 447 |  |
2020 |  |  |  |  | 432 |  |
2021 |  |  |  |  | 416 |  |
2022 |  |  |  |  | 399 |  |
2023 |  |  |  |  | 381 |  |
2022- 2026 |  |  |  |  | 2,683 |  |
Estimated Contributions During 2015 |  |  |  |  | 447 |  |
Postretirement Benefit Plans |  |  |  |  |  |  |
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |  |  |  |  |
Fair Value of Plan Assets |  | 0 | 0 | 0 | 0 |  | 0
Benefit Obligation |  | 7,727 | 7,623 | 7,623 | 7,706 |  | 7,727
Funded Status of Plan |  |  |  |  | (7,706) |  | (7,727)
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] |  |  |  |  |  |  |
Benefit Obligation, Beginning of Period |  | 7,727 | 7,623 |  |  |  |
Service Cost |  | 136 | 130 | 147 |  |  |
Interest Cost |  | 333 | 339 | 340 |  |  |
Plan Participants' Contributions |  | 416 | 492 |  |  |  |
Amendments |  | 453 | 0 |  |  |  |
Actuarial Loss |  | (664) | (14) |  |  |  |
Benefits Paid |  | (695) | (843) |  |  |  |
Benefit Obligation, End of Period |  | 7,706 | 7,727 | 7,623 |  |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |  |  |  |  |  |
Fair Value of Plan Assets, Beginning of Period |  | 0 | 0 |  |  |  |
Actual Return on Plan Assets |  | 0 | 0 |  |  |  |
Employer Contributions |  | 279 | 351 |  |  |  |
Plan Participants' Contributions |  | 416 | 492 |  |  |  |
Benefits Paid |  | (695) | (843) |  |  |  |
Fair Value of Plan Assets, End of Period |  | 0 | 0 | 0 |  |  |
Accumulated Benefit Obligation at December 31, 2012 |  |  |  |  | 7,706 |  |
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] |  |  |  |  |  |  |
Prepaid Benefit Cost |  |  |  |  | 0 |  | 0
Accrued Benefit Liability |  |  |  |  | (7,706) |  | (7,727)
Net Benefit Cost Recognized |  |  |  |  | (7,706) |  | (7,727)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] |  |  |  |  |  |  |
Net Retirement Plan Loss, Before-Tax Amount |  | (665) | (14) | (328) |  |  |
Net prior Service Cost Arising During the Period |  | 453 | 0 | 0 |  |  |
Amortization of Net Loss |  | 0 | 24 | 0 |  |  |
Accretion of Net Retirement Plan Prior Service Credit, Tax (Expense) Benefit |  | (100) | 11 | 12 |  |  |
Total Other Comprehensive (Loss) Income for Pension and Other Postretirement Benefit Plans |  | (312) | 21 | (316) |  |  |
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract] |  |  |  |  |  |  |
Net Actuarial Loss |  |  |  |  | (893) |  | (228)
Prior Service (Credit) Cost |  |  |  |  | 786 |  | 433
Total Accumulated Other Comprehensive Income, Before Tax |  |  |  |  | (107) |  | $ 205
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract] |  |  |  |  |  |  |
Net Actuarial Loss |  |  |  |  | (70) |  |
Prior Service (Credit) Cost |  |  |  |  | $ 101 |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |  |  |  |  |  |
Service Cost |  | 136 | 130 | 147 |  |  |
Interest Cost |  | 333 | 339 | 340 |  |  |
Expected Return on Plan Assets |  | 0 | 0 | 0 |  |  |
Amortization of Prior Service (Credit) Cost |  | 100 | (11) | (12) |  |  |
Amortization of Net Loss |  | 0 | (24) | 0 |  |  |
Net Periodic Benefit Cost |  | $ 569 | $ 434 | $ 475 |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] |  |  |  |  |  |  |
Discount Rate |  |  |  |  | 4.81% |  | 4.22%
Rate of Compensation Increase |  |  |  |  | 3.50% |  | 3.50%
Interest Rate to Annuitize Cash Balance Account |  |  |  |  | 4.88% |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Discount Rate |  | 4.22% | 4.80% | 4.69% |  |  |
Rate of Compensation Increase |  | 3.50% | 3.50% | 3.50% |  |  |
Fair Value of Plan Assets |  | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0
Expected Future Benefit Payments [Abstract] |  |  |  |  |  |  |
2019 |  |  |  |  | 580 |  |
2020 |  |  |  |  | 594 |  |
2021 |  |  |  |  | 639 |  |
2022 |  |  |  |  | 626 |  |
2023 |  |  |  |  | 614 |  |
2022- 2026 |  |  |  |  | 3,212 |  |
Estimated Contributions During 2015 |  |  |  |  | $ 580 |  |
Minimum | Cash |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 0.00% |  | 0.00%
Minimum | Interest-Bearing Money Market Fund |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 0.00% |  | 0.00%
Minimum | Common Stock |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 0.00% |  | 0.00%
Minimum | North Country Funds - Equity |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Minimum | Other Mutual Funds - Equity |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Minimum | Equity Funds |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 55.00% |  | 55.00%
Minimum | North Country Funds - Fixed Income |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Minimum | Other Mutual Funds - Fixed Income |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Minimum | Fixed Income Funds |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 10.00% |  | 10.00%
Maximum | Cash |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 15.00% |  | 15.00%
Maximum | Interest-Bearing Money Market Fund |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 15.00% |  | 15.00%
Maximum | Common Stock |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 10.00% |  | 10.00%
Maximum | North Country Funds - Equity |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Maximum | Other Mutual Funds - Equity |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Maximum | Equity Funds |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 85.00% |  | 85.00%
Maximum | North Country Funds - Fixed Income |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Maximum | Other Mutual Funds - Fixed Income |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  |  |  |
Maximum | Fixed Income Funds |  |  |  |  |  |  |
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] |  |  |  |  |  |  |
Target Allocation Maximum, Percentage |  |  |  |  | 30.00% |  | 30.00%
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% |  |  |  |  |
[1] | Acquisition of Arrow Financial Corporation common stock was under 10% of the total fair value of the employee's pension plan assets at the time of acquisition.
[2] | The North Country Funds - Equity and the North Country Funds - Fixed Income are publicly traded mutual funds advised by Arrow's subsidiary, North Country Investment Advisers, Inc.

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