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Regulations and Supervision - Actual Capital Amounts and Ratios (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Banking Regulation, Total Capital [Abstract] |  |
Total Capital (to risk-weighted assets), Actual Amount | $ 735,187 | $ 720,755
Total Capital (to risk-weighted assets), Actual Ratio | 0.142 | 0.144
Total Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 524,345 | $ 525,755
Total Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.105 | 0.105
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 516,519 | $ 500,719
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.100 | 0.100
Common Equity Tier 1 Capital (To Risk-weighted Assets) |  |
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 688,425 |
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.133 | 0.131
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 361,563 | $ 350,503
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 7.00% | 7.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 335,737 | $ 325,467
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 6.50% | 6.50%
Tier 1 Capital (To Risk-weighted Assets) |  |
Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 688,425 | $ 667,364
Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.133 | 0.133
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 439,041 | $ 425,611
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.085 | 0.085
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 413,215 | $ 400,575
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.080 | 0.080
Tier 1 Leverage Capital (To Average Assets) |  |
Tier 1 Capital (to average assets), Actual Amount | $ 688,425 | $ 667,364
Tier 1 Capital (to average assets), Actual Ratio | 0.087 | 0.088
Tier 1 Capital (to average assets), Minimum Capital Required, Amount | $ 315,820 | $ 305,083
Tier 1 Capital (to average assets), Minimum Capital Required, Ratio | 0.040 | 0.040
Tier 1 Capital (to average assets), Required to be Well Capitalized, Amount | $ 394,775 | $ 381,354
Tier 1 Capital (to average assets), Required to be Well Capitalized, Ratio | 0.050 | 0.050
Castile |  |
Banking Regulation, Total Capital [Abstract] |  |
Total Capital (to risk-weighted assets), Actual Amount | $ 160,757 | $ 157,514
Total Capital (to risk-weighted assets), Actual Ratio | 0.122 | 0.126
Total Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 138,104 | $ 131,034
Total Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.105 | 0.105
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 131,527 | $ 124,795
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.100 | 0.100
Common Equity Tier 1 Capital (To Risk-weighted Assets) |  |
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 149,154 | $ 144,448
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.113 | 0.116
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 92,069 | $ 87,356
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 7.00% | 7.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 85,493 | $ 81,117
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 6.50% | 6.50%
Tier 1 Capital (To Risk-weighted Assets) |  |
Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 149,154 | $ 144,448
Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.113 | 0.116
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 111,798 | $ 106,076
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.085 | 0.085
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 105,222 | $ 99,836
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.080 | 0.080
Tier 1 Leverage Capital (To Average Assets) |  |
Tier 1 Capital (to average assets), Actual Amount | $ 149,154 | $ 144,448
Tier 1 Capital (to average assets), Actual Ratio | 0.079 | 0.081
Tier 1 Capital (to average assets), Minimum Capital Required, Amount | $ 75,935 | $ 71,605
Tier 1 Capital (to average assets), Minimum Capital Required, Ratio | 0.040 | 0.040
Tier 1 Capital (to average assets), Required to be Well Capitalized, Amount | $ 94,918 | $ 89,507
Tier 1 Capital (to average assets), Required to be Well Capitalized, Ratio | 0.050 | 0.050
Mahopac |  |
Banking Regulation, Total Capital [Abstract] |  |
Total Capital (to risk-weighted assets), Actual Amount | $ 136,247 | $ 133,969
Total Capital (to risk-weighted assets), Actual Ratio | 0.127 | 0.130
Total Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 112,649 | $ 108,129
Total Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.105 | 0.105
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 107,285 | $ 102,980
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.100 | 0.100
Common Equity Tier 1 Capital (To Risk-weighted Assets) |  |
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 126,718 | $ 122,393
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.118 | 0.119
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 75,100 | $ 72,086
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 7.00% | 7.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 69,735 | $ 66,937
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 6.50% | 6.50%
Tier 1 Capital (To Risk-weighted Assets) |  |
Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 126,718 | $ 122,393
Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.118 | 0.119
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 91,192 | $ 87,533
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.085 | 0.085
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 85,282 | $ 82,384
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.080 | 0.080
Tier 1 Leverage Capital (To Average Assets) |  |
Tier 1 Capital (to average assets), Actual Amount | $ 126,718 | $ 122,393
Tier 1 Capital (to average assets), Actual Ratio | 0.081 | 0.082
Tier 1 Capital (to average assets), Minimum Capital Required, Amount | $ 62,815 | $ 59,742
Tier 1 Capital (to average assets), Minimum Capital Required, Ratio | 0.040 | 0.040
Tier 1 Capital (to average assets), Required to be Well Capitalized, Amount | $ 78,519 | $ 74,678
Tier 1 Capital (to average assets), Required to be Well Capitalized, Ratio | 0.050 | 0.050
VIST |  |
Banking Regulation, Total Capital [Abstract] |  |
Total Capital (to risk-weighted assets), Actual Amount | $ 173,889 | $ 175,931
Total Capital (to risk-weighted assets), Actual Ratio | 0.136 | 0.137
Total Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 134,403 | $ 134,615
Total Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.105 | 0.105
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 128,003 | $ 128,205
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.100 | 0.100
Common Equity Tier 1 Capital (To Risk-weighted Assets) |  |
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 163,145 | $ 163,895
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.128 | 0.128
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 89,602 | $ 89,743
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 7.00% | 7.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 83,202 | $ 83,333
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 6.50% | 6.50%
Tier 1 Capital (To Risk-weighted Assets) |  |
Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 163,145 | $ 163,895
Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.128 | 0.128
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 108,803 | $ 108,794
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.085 | 0.085
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 102,403 | $ 102,564
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.080 | 0.080
Tier 1 Leverage Capital (To Average Assets) |  |
Tier 1 Capital (to average assets), Actual Amount | $ 163,145 | $ 163,895
Tier 1 Capital (to average assets), Actual Ratio | 0.084 | 0.084
Tier 1 Capital (to average assets), Minimum Capital Required, Amount | $ 77,953 | $ 77,874
Tier 1 Capital (to average assets), Minimum Capital Required, Ratio | 0.040 | 0.040
Tier 1 Capital (to average assets), Required to be Well Capitalized, Amount | $ 97,441 | $ 83,333
Tier 1 Capital (to average assets), Required to be Well Capitalized, Ratio | 0.050 | 0.050
Subsidiaries |  |
Banking Regulation, Total Capital [Abstract] |  |
Total Capital (to risk-weighted assets), Actual Amount | $ 219,976 | $ 210,756
Total Capital (to risk-weighted assets), Actual Ratio | 0.148 | 0.147
Total Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 156,631 | $ 150,482
Total Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.105 | 0.105
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 149,172 | $ 143,316
Total Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.100 | 0.100
Common Equity Tier 1 Capital (To Risk-weighted Assets) |  |
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 207,632 | $ 196,522
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.139 | 0.137
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 104,421 | $ 100,321
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 7.00% | 7.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 96,962 | $ 93,156
Common Equity Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 6.50% | 6.50%
Tier 1 Capital (To Risk-weighted Assets) |  |
Tier 1 Capital (to risk-weighted assets), Actual Amount | $ 207,632 | $ 196,522
Tier 1 Capital (to risk-weighted assets), Actual Ratio | 0.139 | 0.137
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Amount | $ 126,797 | $ 121,819
Tier 1 Capital (to risk-weighted assets), Minimum Capital Required, Ratio | 0.085 | 0.085
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Amount | $ 119,338 | $ 114,653
Tier 1 Capital (to risk-weighted assets), Required to be Well Capitalized, Ratio | 0.080 | 0.080
Tier 1 Leverage Capital (To Average Assets) |  |
Tier 1 Capital (to average assets), Actual Amount | $ 207,632 | $ 196,522
Tier 1 Capital (to average assets), Actual Ratio | 0.084 | 0.082
Tier 1 Capital (to average assets), Minimum Capital Required, Amount | $ 99,000 | $ 95,691
Tier 1 Capital (to average assets), Minimum Capital Required, Ratio | 0.040 | 0.040
Tier 1 Capital (to average assets), Required to be Well Capitalized, Amount | $ 123,751 | $ 119,614
Tier 1 Capital (to average assets), Required to be Well Capitalized, Ratio | 0.050 | 0.050

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- Definition Ratio of minimum Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition Ratio of Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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