XML 26 R2.htm IDEA: XBRL DOCUMENT
v3.23.2

Pay vs Performance Disclosure number in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure [Table] |  |  |
Pay vs Performance [Table Text Block] |
|  |  |  |  | Year-end value of $100 invested on December 31, 2019 in: |  |
Year | Summary Compensation Table Total for PEO (1) | Compensation Actually Paid to PEO (1)(2)(3)(4) | Average Summary Compensation Table Total for Non-PEO NEOs (5) | Average Compensation Actually Paid to Non-PEO NEOs (2)(3)(4)(5) | Arrow Financial Corporation | ABA NASDAQ Community Bank Index (TR) | Net Income (in millions) | Net Operating Earnings (in millions) (6)
2022 | $ | 1,742,204 |  | $ | 1,922,576 |  | $ | 584,089 |  | $ | 562,080 |  | $ | 107.97 |  | $ | 102.65 |  | $ | 48.80 |  | $ | 48.31 |
2021 | $ | 2,146,089 |  | $ | 2,013,535 |  | $ | 557,166 |  | $ | 601,047 |  | $ | 105.51 |  | $ | 113.25 |  | $ | 49.90 |  | $ | 49.99 |
2020 | $ | 1,692,259 |  | $ | 1,430,452 |  | $ | 481,414 |  | $ | 436,109 |  | $ | 84.42 |  | $ | 85.57 |  | $ | 40.80 |  | $ | 40.84 |
Company Selected Measure Name | Net Operating Earnings |  |
Named Executive Officers, Footnote [Text Block] | The PEO, Principal Executive Officer, in each reporting year is Thomas J. MurphyNon-PEO NEOs reflect the average Summary Compensation Table total compensation and average CAP for the following executives in each reporting year: Edward J. Campanella, David S. DeMarco, David D. Kaiser and Andrew J. Wise |  |
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 [Text Block] | Subtractions from, and additions to, total compensation in the Summary Compensation table by year to calculate CAP include:
|  |  | 2022 |  | 2021 |  | 2020
|  |  | 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 | $ | 1,742,204 |  |  | $ | 584,089 |  |  | $ | 2,146,089 |  |  | $ | 557,166 |  |  | $ | 1,692,259 |  |  | $ | 481,414 |
Adjustments for Pension |  |  |  |  |  |  |  |  |  |  |
| Adjustment Summary Compensation Table Pension |  | $ | (470,237) |  |  | $ | (52,579) |  |  | $ | (908,942) |  |  | $ | (46,099) |  |  | $ | (614,685) |  |  | $ | (49,985) |
| Amount added for current year service cost |  | $ | 595,215 |  |  | $ | 33,255 |  |  | $ | 571,465 |  |  | $ | 31,163 |  |  | $ | 482,936 |  |  | $ | 29,857 |
Total Adjustments for Pension | $ | 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 |  | $ | (226,485) |  |  | $ | (38,251) |  |  | $ | (187,798) |  |  | $ | (24,251) |  |  | $ | (184,917) |  |  | $ | (24,950) |
| Year-end fair value of unvested awards granted in the current year |  | $ | 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 |  | $ | 38,559 |  |  | $ | 18,756 |  |  | $ | 106,511 |  |  | $ | 29,766 |  |  | $ | (110,642) |  |  | $ | (21,395) |
| Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years |  | $ | (986) |  |  | $ | 1,098 |  |  | $ | (6,543) |  |  | $ | (721) |  |  | $ | (18,867) |  |  | $ | (6,556) |
| Forfeitures during current year equal to prior year-end fair value |  | $ | — |  |  | $ | (17,228) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Dividends or dividend equivalents not otherwise included in total compensation |  | $ | 13,723 |  |  | $ | — |  |  | $ | 12,783 |  |  | $ | — |  |  | $ | 11,012 |  |  | $ | — |
Total Adjustments for Equity Awards | $ | 55,394 |  |  | $ | (2,685) |  |  | $ | 204,923 |  |  | $ | 58,817 |  |  | $ | (130,058) |  |  | $ | (25,177) |
Compensation Actually Paid (as calculated) | $ | 1,922,576 |  |  | $ | 562,080 |  |  | $ | 2,013,535 |  |  | $ | 601,047 |  |  | $ | 1,430,452 |  |  | $ | 436,109 |
Non-PEO NEO Average Total Compensation Amount | $ 584,089 | 557,166 | 481,414
Non-PEO NEO Average Compensation Actually Paid Amount | $ 562,080 | 601,047 | 436,109
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | Subtractions from, and additions to, total compensation in the Summary Compensation table by year to calculate CAP include:
|  |  | 2022 |  | 2021 |  | 2020
|  |  | 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 | $ | 1,742,204 |  |  | $ | 584,089 |  |  | $ | 2,146,089 |  |  | $ | 557,166 |  |  | $ | 1,692,259 |  |  | $ | 481,414 |
Adjustments for Pension |  |  |  |  |  |  |  |  |  |  |
| Adjustment Summary Compensation Table Pension |  | $ | (470,237) |  |  | $ | (52,579) |  |  | $ | (908,942) |  |  | $ | (46,099) |  |  | $ | (614,685) |  |  | $ | (49,985) |
| Amount added for current year service cost |  | $ | 595,215 |  |  | $ | 33,255 |  |  | $ | 571,465 |  |  | $ | 31,163 |  |  | $ | 482,936 |  |  | $ | 29,857 |
Total Adjustments for Pension | $ | 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 |  | $ | (226,485) |  |  | $ | (38,251) |  |  | $ | (187,798) |  |  | $ | (24,251) |  |  | $ | (184,917) |  |  | $ | (24,950) |
| Year-end fair value of unvested awards granted in the current year |  | $ | 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 |  | $ | 38,559 |  |  | $ | 18,756 |  |  | $ | 106,511 |  |  | $ | 29,766 |  |  | $ | (110,642) |  |  | $ | (21,395) |
| Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years |  | $ | (986) |  |  | $ | 1,098 |  |  | $ | (6,543) |  |  | $ | (721) |  |  | $ | (18,867) |  |  | $ | (6,556) |
| Forfeitures during current year equal to prior year-end fair value |  | $ | — |  |  | $ | (17,228) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Dividends or dividend equivalents not otherwise included in total compensation |  | $ | 13,723 |  |  | $ | — |  |  | $ | 12,783 |  |  | $ | — |  |  | $ | 11,012 |  |  | $ | — |
Total Adjustments for Equity Awards | $ | 55,394 |  |  | $ | (2,685) |  |  | $ | 204,923 |  |  | $ | 58,817 |  |  | $ | (130,058) |  |  | $ | (25,177) |
Compensation Actually Paid (as calculated) | $ | 1,922,576 |  |  | $ | 562,080 |  |  | $ | 2,013,535 |  |  | $ | 601,047 |  |  | $ | 1,430,452 |  |  | $ | 436,109 |
Compensation Actually Paid vs. Total Shareholder Return [Text Block] | CAP and Cumulative TSR / Cumulative TSR of the Peer Group |  |
Compensation Actually Paid vs. Net Income [Text Block] | CAP and Company Net Income |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] | CAP and Company Selected Measure, Net Operating Earnings |  |
Total Shareholder Return Vs Peer Group [Text Block] | CAP and Cumulative TSR / Cumulative TSR of the Peer Group |  |
Tabular List [Table Text Block] | Net Operating Earnings •Return on Equity •Efficiency Ratio •Non-Performing Loans •Net Charge-Offs |  |
Total Shareholder Return Amount | $ 107.97 | 105.51 | 84.42
Peer Group Total Shareholder Return Amount | 102.65 | 113.25 | 85.57
Net Income (Loss) | $ 48,800,000 | $ 49,900,000 | $ 40,800,000
Company Selected Measure Amount | 48,310 | 49,990 | 40,840
PEO Name | Thomas J. Murphy |  |
Additional 402(v) Disclosure [Text Block] | 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 2022 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
| 2022 | 2021 | 2020
Expected volatility |  | 36% - 39% | 36% - 41% | 28% - 29%
Expected dividend yield |  | 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
Risk-free interest rate |  | 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 2022, 2021 and 2020 (note that no awards vested during 2020):
|  | Weighted Average Fair Value
| 2022 | 2021 | 2020
Weighted Average Fair Value at vesting |  | $34.35 | $27.61 | N/A
Measure [Axis]: 1 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Net Operating Earnings |  |
Non-GAAP Measure Description [Text Block] | Net Operating Earnings as defined in the Compensation Discussion and Analysis section of this Proxy Statement |  |
Measure [Axis]: 2 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Return on Equity |  |
Measure [Axis]: 3 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Efficiency Ratio |  |
Measure [Axis]: 4 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Non-Performing Loans |  |
Measure [Axis]: 5 |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Measure Name | Net Charge-Offs |  |
PEO [Member] | Change in Pension Value [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Pension | $ (470,237) | $ (908,942) | $ (614,685)
PEO [Member] | Pension Adjustments, Service Cost [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Pension | 595,215 | 571,465 | 482,936
PEO [Member] | Pension Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 124,978 | (337,477) | (131,749)
PEO [Member] | Equity Award Value Reported in Summary Compensation Table [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | (226,485) | (187,798) | (184,917)
PEO [Member] | Equity Awards Granted During the Year, Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 230,583 | 279,970 | 173,356
PEO [Member] | Equity Awards Granted in Prior Years, Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 38,559 | 106,511 | (110,642)
PEO [Member] | Equity Awards Granted in Prior Years, Vested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | (986) | (6,543) | (18,867)
PEO [Member] | Equity Awards that Failed to Meet Vesting Conditions [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 0 | 0 | 0
PEO [Member] | Equity Awards, Value of Dividends and Other Earnings Paid Adjustment [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 13,723 | 12,783 | 11,012
PEO [Member] | Equity Award Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | 55,394 | 204,923 | (130,058)
Non-PEO NEO [Member] | Change in Pension Value [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Pension | (52,579) | (46,099) | (49,985)
Non-PEO NEO [Member] | Pension Adjustments, Service Cost [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Pension | 33,255 | 31,163 | 29,857
Non-PEO NEO [Member] | Pension Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | (19,324) | (14,936) | (20,128)
Non-PEO NEO [Member] | Equity Award Value Reported in Summary Compensation Table [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | (38,251) | (24,251) | (24,950)
Non-PEO NEO [Member] | Equity Awards Granted During the Year, Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 32,940 | 54,023 | 27,724
Non-PEO NEO [Member] | Equity Awards Granted in Prior Years, Unvested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 18,756 | 29,766 | (21,395)
Non-PEO NEO [Member] | Equity Awards Granted in Prior Years, Vested [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 1,098 | (721) | (6,556)
Non-PEO NEO [Member] | Equity Awards that Failed to Meet Vesting Conditions [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | (17,228) | 0 | 0
Non-PEO NEO [Member] | Equity Awards, Value of Dividends and Other Earnings Paid Adjustment [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount, Equity Awards | 0 | 0 | 0
Non-PEO NEO [Member] | Equity Award Adjustments [Member] |  |  |
Pay vs Performance Disclosure [Table] |  |  |
Adjustment to Compensation Amount | $ (2,685) | $ 58,817 | $ (25,177)

X
- References No definition available. + Details
Name: | arow_AdjustmentToCompensationAmountEquityAwards
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | arow_AdjustmentToCompensationAmountPension
Namespace Prefix: | arow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v + Details
Name: | ecd_Additional402vDisclosureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToNonPeoNeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToPeoCompFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iii + Details
Name: | ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_MeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_NonGaapMeasureDescriptionTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_PeoName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnVsPeerGroupTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 65 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580 Reference 25: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_MeasureAxis=1
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=2
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=3
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=4
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=5
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_PeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_ChangeInPensionValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_PensionAdjustmentsServiceCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_PensionAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardValueReportedInSummaryCompensationTableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardsGrantedDuringTheYearUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardsGrantedInPriorYearsUnvestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardsGrantedInPriorYearsVestedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardsThatFailedToMeetVestingConditionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardsValueOfDividendsAndOtherEarningsPaidAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=arow_EquityAwardAdjustmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_ExecutiveCategoryAxis=ecd_NonPeoNeoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |