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Pay vs Performance Disclosure | 4 Months Ended | 8 Months Ended | 12 Months Ended
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May 12, 2023 | Dec. 31, 2023 | Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure |  |  |  |  |  |
Pay vs Performance Disclosure, Table |  |  |
|  |  |  |  |  |  | Year-end value of $100 invested on December 31, 2019 in: |  |
Year | Summary Compensation Table Total for PEO (Murphy) | Compensation Actually Paid to PEO (Murphy) | Summary Compensation Table Total for PEO (DeMarco) | Compensation Actually Paid to PEO (DeMarco) | Average Summary Compensation Table Total for Non-PEO NEOs | Average Compensation Actually Paid to Non-PEO NEOs | Arrow Financial Corporation | ABA NASDAQ Community Bank Index (TR) | Net Income (in millions) | Net Operating Earnings (in millions)
| (1) | (1)(2)(3)(4) | (1) | (1)(2)(3)(4) | (5) | (2)(3)(4)(5) |  |  |  | (6)
2023 | $1,662,004 | $692,271 | $943,532 | $798,398 | $541,482 | $480,734 | $96.33 | $97.22 | $30.10 | $34.47
2022 | $1,742,204 | $1,922,576 | N/A | N/A | $584,089 | $562,080 | $107.97 | $102.65 | $48.80 | $48.31
2021 | $2,146,089 | $2,013,535 | N/A | N/A | $557,166 | $601,047 | $105.51 | $113.25 | $49.90 | $49.99
2020 | $1,692,259 | $1,430,452 | N/A | N/A | $481,414 | $436,109 | $84.42 | $85.57 | $40.80 | $40.84
Company Selected Measure Name |  |  | Net Operating Earnings |  |  |
Named Executive Officers, Footnote |  |  | The PEO in each reporting year is Thomas J. Murphy, who was an Executive Officer until May 12, 2023. The new PEO is David S. DeMarco. Non-PEO NEOs reflect the average Summary Compensation Table total compensation and average CAP for Penko Ivanov, David D Kaiser and Andrew J. Wise in the 2023 reporting year, and Edward J. Campanella, David S. DeMarco, David D. Kaiser and Andrew J. Wise in for the 2020-2022 reporting years. |  |  |
PEO Total Compensation Amount |  |  |  | $ 1,742,204 | $ 2,146,089 | $ 1,692,259
PEO Actually Paid Compensation Amount |  |  |  | 1,922,576 | 2,013,535 | 1,430,452
Adjustment To PEO Compensation, Footnote |  |  | Subtractions from, and additions to, total compensation in the Summary Compensation table by year to calculate CAP include:
|  |  | 2023 |  | 2022 |  | 2021 |  | 2020
|  |  | PEO (Murphy) |  | PEO (DeMarco) |  | Average of Other Non-PEO NEOs |  | PEO |  | Average of Other Non-PEO NEOs |  | PEO |  | Average of Other Non-PEO NEOs |  | PEO |  | Average of Other Non-PEO NEOs
Total Compensation from from Summary Compensation Table | $ | 1,662,004 |  |  | $ | 943,532 |  |  | $ | 541,482 |  |  | $ | 1,742,204 |  |  | $ | 584,089 |  |  | $ | 2,146,089 |  |  | $ | 557,166 |  |  | $ | 1,692,259 |  |  | $ | 481,414 |
Adjustments for Pension |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Adjustment Summary Compensation Table Pension |  | $ | (1,031,417) |  |  | $ | (151,195) |  |  | $ | (51,964) |  |  | $ | (470,237) |  |  | $ | (52,579) |  |  | $ | (908,942) |  |  | $ | (46,099) |  |  | $ | (614,685) |  |  | $ | (49,985) |
| Amount added for current year service cost |  | $ | 530,040 |  |  | $ | 65,438 |  |  | $ | 24,772 |  |  | $ | 595,215 |  |  | $ | 33,255 |  |  | $ | 571,465 |  |  | $ | 31,163 |  |  | $ | 482,936 |  |  | $ | 29,857 |
Total Adjustments for Pension | $ | (501,377) |  |  | $ | (85,757) |  |  | $ | (27,192) |  |  | $ | 124,978 |  |  | $ | (19,324) |  |  | $ | (337,477) |  |  | $ | (14,936) |  |  | $ | (131,749) |  |  | $ | (20,128) |
Adjustments for Equity Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Adjustment for grant date values in the Summary Compensation Table |  | $ | (242,704) |  |  | $ | (40,100) |  |  | $ | (26,733) |  |  | $ | (226,485) |  |  | $ | (38,251) |  |  | $ | (187,798) |  |  | $ | (24,251) |  |  | $ | (184,917) |  |  | $ | (24,950) |
| Year-end fair value of unvested awards granted in the current year |  | $ | — |  |  | $ | 32,551 |  |  | $ | 21,701 |  |  | $ | 230,583 |  |  | $ | 32,940 |  |  | $ | 279,970 |  |  | $ | 54,023 |  |  | $ | 173,356 |  |  | $ | 27,724 |
| Year-over-year difference of year-end fair values and vest date fair values for awards granted in prior years |  | $ | — |  |  | $ | (35,652) |  |  | $ | (25,412) |  |  | $ | 38,559 |  |  | $ | 18,756 |  |  | $ | 106,511 |  |  | $ | 29,766 |  |  | $ | (110,642) |  |  | $ | (21,395) |
| Fair values at vest date for awards granted and vested in current year |  | $ | 99,539 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years |  | $ | (159,079) |  |  | $ | (2,844) |  |  | $ | (3,112) |  |  | $ | (986) |  |  | $ | 1,098 |  |  | $ | (6,543) |  |  | $ | (721) |  |  | $ | (18,867) |  |  | $ | (6,556) |
| Forfeitures during current year equal to prior year-end fair value |  | $ | (169,874) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (17,228) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Dividends or dividend equivalents not otherwise included in total compensation |  | $ | 3,762 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,723 |  |  | $ | — |  |  | $ | 12,783 |  |  | $ | — |  |  | $ | 11,012 |  |  | $ | — |
Total Adjustments for Equity Awards | $ | (468,356) |  |  | $ | (46,054) |  |  | $ | (33,557) |  |  | $ | 55,394 |  |  | $ | (2,685) |  |  | $ | 204,923 |  |  | $ | 58,817 |  |  | $ | (130,058) |  |  | $ | (25,177) |
Compensation Actually Paid (as calculated) | $ | 692,271 |  |  | $ | 798,398 |  |  | $ | 480,734 |  |  | $ | 1,922,576 |  |  | $ | 562,080 |  |  | $ | 2,013,535 |  |  | $ | 601,047 |  |  | $ | 1,430,452 |  |  | $ | 436,109 |
Non-PEO NEO Average Total Compensation Amount |  |  | $ 541,482 | 584,089 | 557,166 | 481,414
Non-PEO NEO Average Compensation Actually Paid Amount |  |  | $ 480,734 | 562,080 | 601,047 | 436,109
Adjustment to Non-PEO NEO Compensation Footnote |  |  | Subtractions from, and additions to, total compensation in the Summary Compensation table by year to calculate CAP include:
|  |  | 2023 |  | 2022 |  | 2021 |  | 2020
|  |  | PEO (Murphy) |  | PEO (DeMarco) |  | Average of Other Non-PEO NEOs |  | PEO |  | Average of Other Non-PEO NEOs |  | PEO |  | Average of Other Non-PEO NEOs |  | PEO |  | Average of Other Non-PEO NEOs
Total Compensation from from Summary Compensation Table | $ | 1,662,004 |  |  | $ | 943,532 |  |  | $ | 541,482 |  |  | $ | 1,742,204 |  |  | $ | 584,089 |  |  | $ | 2,146,089 |  |  | $ | 557,166 |  |  | $ | 1,692,259 |  |  | $ | 481,414 |
Adjustments for Pension |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Adjustment Summary Compensation Table Pension |  | $ | (1,031,417) |  |  | $ | (151,195) |  |  | $ | (51,964) |  |  | $ | (470,237) |  |  | $ | (52,579) |  |  | $ | (908,942) |  |  | $ | (46,099) |  |  | $ | (614,685) |  |  | $ | (49,985) |
| Amount added for current year service cost |  | $ | 530,040 |  |  | $ | 65,438 |  |  | $ | 24,772 |  |  | $ | 595,215 |  |  | $ | 33,255 |  |  | $ | 571,465 |  |  | $ | 31,163 |  |  | $ | 482,936 |  |  | $ | 29,857 |
Total Adjustments for Pension | $ | (501,377) |  |  | $ | (85,757) |  |  | $ | (27,192) |  |  | $ | 124,978 |  |  | $ | (19,324) |  |  | $ | (337,477) |  |  | $ | (14,936) |  |  | $ | (131,749) |  |  | $ | (20,128) |
Adjustments for Equity Awards |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Adjustment for grant date values in the Summary Compensation Table |  | $ | (242,704) |  |  | $ | (40,100) |  |  | $ | (26,733) |  |  | $ | (226,485) |  |  | $ | (38,251) |  |  | $ | (187,798) |  |  | $ | (24,251) |  |  | $ | (184,917) |  |  | $ | (24,950) |
| Year-end fair value of unvested awards granted in the current year |  | $ | — |  |  | $ | 32,551 |  |  | $ | 21,701 |  |  | $ | 230,583 |  |  | $ | 32,940 |  |  | $ | 279,970 |  |  | $ | 54,023 |  |  | $ | 173,356 |  |  | $ | 27,724 |
| Year-over-year difference of year-end fair values and vest date fair values for awards granted in prior years |  | $ | — |  |  | $ | (35,652) |  |  | $ | (25,412) |  |  | $ | 38,559 |  |  | $ | 18,756 |  |  | $ | 106,511 |  |  | $ | 29,766 |  |  | $ | (110,642) |  |  | $ | (21,395) |
| Fair values at vest date for awards granted and vested in current year |  | $ | 99,539 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years |  | $ | (159,079) |  |  | $ | (2,844) |  |  | $ | (3,112) |  |  | $ | (986) |  |  | $ | 1,098 |  |  | $ | (6,543) |  |  | $ | (721) |  |  | $ | (18,867) |  |  | $ | (6,556) |
| Forfeitures during current year equal to prior year-end fair value |  | $ | (169,874) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (17,228) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Dividends or dividend equivalents not otherwise included in total compensation |  | $ | 3,762 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,723 |  |  | $ | — |  |  | $ | 12,783 |  |  | $ | — |  |  | $ | 11,012 |  |  | $ | — |
Total Adjustments for Equity Awards | $ | (468,356) |  |  | $ | (46,054) |  |  | $ | (33,557) |  |  | $ | 55,394 |  |  | $ | (2,685) |  |  | $ | 204,923 |  |  | $ | 58,817 |  |  | $ | (130,058) |  |  | $ | (25,177) |
Compensation Actually Paid (as calculated) | $ | 692,271 |  |  | $ | 798,398 |  |  | $ | 480,734 |  |  | $ | 1,922,576 |  |  | $ | 562,080 |  |  | $ | 2,013,535 |  |  | $ | 601,047 |  |  | $ | 1,430,452 |  |  | $ | 436,109 |
Compensation Actually Paid vs. Total Shareholder Return |  |  | CAP and Cumulative TSR / Cumulative TSR of the Peer Group |  |  |
Compensation Actually Paid vs. Net Income |  |  | CAP and Company Net Income |  |  |
Compensation Actually Paid vs. Company Selected Measure |  |  | CAP and Company Selected Measure, Net Operating Earnings |  |  |
Total Shareholder Return Vs Peer Group |  |  | CAP and Cumulative TSR / Cumulative TSR of the Peer Group |  |  |
Tabular List, Table |  |  | Net Operating Earnings •Return on Equity •Efficiency Ratio •Non-Performing Loans •Net Charge-Offs |  |  |
Total Shareholder Return Amount |  |  | $ 96.33 | 107.97 | 105.51 | 84.42
Peer Group Total Shareholder Return Amount |  |  | 97.22 | 102.65 | 113.25 | 85.57
Net Income (Loss) |  |  | $ 30,100,000 | $ 48,800,000 | $ 49,900,000 | $ 40,800,000
Company Selected Measure Amount |  |  | 34,470,000 | 48,310,000 | 49,990,000 | 40,840,000
PEO Name | Thomas J. Murphy | David S. DeMarco |  | Thomas J. Murphy | Thomas J. Murphy | Thomas J. Murphy
Additional 402(v) Disclosure |  |  | The following table illustrates the valuation assumptions used for stock option awards included as part of CAP: •Expected life of each stock option is based on the "simplified method" using an average of the remaining vest and remaining term, as of the vest/fiscal year end date. •Number of options and exercise price are valued as of Fiscal Year End 2023 point-in-time. •Risk-free-rate is based on the Treasury Constant Maturity rate closest to the remaining expected life as of the vest/fiscal year end date. •Historical volatility is based on daily price history for each expected life (years) prior to each vest/fiscal year end date. Closing prices provided by S&P Capital IQ are adjusted for dividends and splits.
|  | For Stock Options Vesting in
| 2023 | 2022 | 2021 | 2020
Expected volatility |  | 35% - 40% | 36% - 39% | 36% - 41% | 28% - 29%
Expected dividend yield |  | 3.3% - 3.3% | 3.1% - 3.1% | 3.4% - 3.6% | 2.9% - 3.0%
Expected term, in years |  | 3.0 - 4.5 | 3.0 - 4.5 | 3.0 - 4.5 | 3.0 - 4.5
Risk-free interest rate |  | 3.6% - 4.0% | 1.4% - 1.7% | 0.2% - 0.5% | 1.3% - 1.4%
The following table illustrates the valuation assumptions as of the vesting date for restricted stock awards that vested in each of 2023, 2022, 2021 and 2020 (note that no awards vested during 2020):
|  | Weighted Average Fair Value
| 2023 | 2022 | 2021 | 2020
Weighted Average Fair Value at vesting |  | $22.56 | $34.35 | $27.61 | N/A
Option Awards, Expected Volatility, Minimum |  |  | 35.00% | 36.00% | 36.00% | 28.00%
Option Awards, Expected Volatility, Maximum |  |  | 40.00% | 39.00% | 41.00% | 29.00%
Option Awards, Expected Dividend Yield, Minimum |  |  | 3.30% | 3.10% | 3.40% | 2.90%
Option Awards, Expected Dividend Yield, Maximum |  |  | 3.30% | 3.10% | 3.60% | 3.00%
Option Awards, Expected Term, Minimum |  |  | 3 years | 3 years | 3 years | 3 years
Option Awards, Expected Term, Maximum |  |  | 4 years 6 months | 4 years 6 months | 4 years 6 months | 4 years 6 months
Option Awards, Risk-Free Interest Rate, Minimum |  |  | 3.60% | 1.40% | 0.20% | 1.30%
Option Awards, Risk-Free Interest Rate, Maximum |  |  | 4.00% | 1.70% | 0.50% | 1.40%
Restricted Share Awards, Weighted Average Fair Value | $ / shares |  |  | $ 22.56 | $ 34.35 | $ 27.61 |
Measure:: 1 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  |  | Net Operating Earnings |  |  |
Non-GAAP Measure Description |  |  | Net Operating Earnings are as defined in the Compensation Discussion and Analysis section of this Proxy Statement. |  |  |
Measure:: 2 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  |  | Return on Equity |  |  |
Measure:: 3 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  |  | Efficiency Ratio |  |  |
Measure:: 4 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  |  | Non-Performing Loans |  |  |
Measure:: 5 |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Name |  |  | Net Charge-Offs |  |  |
Thomas J. Murphy [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
PEO Total Compensation Amount |  |  | $ 1,662,004 | $ 1,742,204 | $ 2,146,089 | $ 1,692,259
PEO Actually Paid Compensation Amount |  |  | 692,271 | 1,922,576 | 2,013,535 | 1,430,452
David S. DeMarco [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
PEO Total Compensation Amount |  |  | 943,532 |  |  |
PEO Actually Paid Compensation Amount |  |  | 798,398 |  |  |
PEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | (470,237) | (908,942) | (614,685)
PEO | Pension Adjustments Service Cost |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 595,215 | 571,465 | 482,936
PEO | Equity Awards Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 55,394 | 204,923 | (130,058)
PEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | (226,485) | (187,798) | (184,917)
PEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 230,583 | 279,970 | 173,356
PEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 38,559 | 106,511 | (110,642)
PEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 0 | 0 | 0
PEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | (986) | (6,543) | (18,867)
PEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 0 | 0 | 0
PEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 13,723 | 12,783 | 11,012
PEO | Pension Adjustments [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  |  | 124,978 | (337,477) | (131,749)
PEO | Thomas J. Murphy [Member] | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (1,031,417) |  |  |
PEO | Thomas J. Murphy [Member] | Pension Adjustments Service Cost |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 530,040 |  |  |
PEO | Thomas J. Murphy [Member] | Equity Awards Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (468,356) |  |  |
PEO | Thomas J. Murphy [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (242,704) |  |  |
PEO | Thomas J. Murphy [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 |  |  |
PEO | Thomas J. Murphy [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 |  |  |
PEO | Thomas J. Murphy [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 99,539 |  |  |
PEO | Thomas J. Murphy [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (159,079) |  |  |
PEO | Thomas J. Murphy [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (169,874) |  |  |
PEO | Thomas J. Murphy [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 3,762 |  |  |
PEO | Thomas J. Murphy [Member] | Pension Adjustments [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (501,377) |  |  |
PEO | David S. DeMarco [Member] | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (151,195) |  |  |
PEO | David S. DeMarco [Member] | Pension Adjustments Service Cost |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 65,438 |  |  |
PEO | David S. DeMarco [Member] | Equity Awards Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (46,054) |  |  |
PEO | David S. DeMarco [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (40,100) |  |  |
PEO | David S. DeMarco [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 32,551 |  |  |
PEO | David S. DeMarco [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (35,652) |  |  |
PEO | David S. DeMarco [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 |  |  |
PEO | David S. DeMarco [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (2,844) |  |  |
PEO | David S. DeMarco [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 |  |  |
PEO | David S. DeMarco [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 |  |  |
PEO | David S. DeMarco [Member] | Pension Adjustments [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (85,757) |  |  |
Non-PEO NEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (51,964) | (52,579) | (46,099) | (49,985)
Non-PEO NEO | Pension Adjustments Service Cost |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 24,772 | 33,255 | 31,163 | 29,857
Non-PEO NEO | Equity Awards Adjustments |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (33,557) | (2,685) | 58,817 | (25,177)
Non-PEO NEO | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (26,733) | (38,251) | (24,251) | (24,950)
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 21,701 | 32,940 | 54,023 | 27,724
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (25,412) | 18,756 | 29,766 | (21,395)
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 | 0 | 0 | 0
Non-PEO NEO | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | (3,112) | 1,098 | (721) | (6,556)
Non-PEO NEO | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 | (17,228) | 0 | 0
Non-PEO NEO | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | 0 | 0 | 0 | 0
Non-PEO NEO | Pension Adjustments [Member] |  |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |  |
Adjustment to Compensation, Amount |  |  | $ (27,192) | $ (19,324) | $ (14,936) | $ (20,128)

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