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Regulatory Capital - Summary of Regulatory Capital Requirement (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital (to risk-weighted assets), Actual, Amount $ 708,198 $ 548,364
Total capital (to risk-weighted assets), Actual, Ratio 0.1571 0.1395
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount $ 360,737 $ 314,395
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio 0.0800 0.0800
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 473,468 $ 412,644
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio 10.50% 10.50%
Tier 1 capital (to average assets), Actual, Amount $ 661,729 $ 530,643
Tier 1 capital (to average assets), Actual, Ratio 0.1468 0.1350
Tier 1 capital (to average assets), For capital adequacy purposes, Amount $ 270,553 $ 235,796
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio 0.0600 0.0600
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 383,284 $ 334,044
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio 8.50% 8.50%
Common equity tier 1 capital, Actual Amount $ 541,920 $ 473,150
Common equity tier 1 capital, Actual Ratio 0.1202 0.1204
Common equity tier 1 capital, For capital adequacy purposes, Amount $ 202,915 $ 176,846
Common equity tier 1 capital, For capital adequacy purpose, Ratio 4.50% 4.50%
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 315,645 $ 275,094
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio 7.00% 7.50%
Tier 1 capital (to average assets), Actual, Amount $ 661,729 $ 530,643
Tier 1 capital (to average assets), Actual, Ratio 0.0905 0.1050
Tier 1 capital (to average assets), For capital adequacy purposes, Amount $ 292,335 $ 202,111
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio 0.0400 0.0400
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 292,335 $ 202,111
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio 4.00% 4.00%
Bank    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital (to risk-weighted assets), Actual, Amount $ 664,061 $ 497,227
Total capital (to risk-weighted assets), Actual, Ratio 0.1472 0.1265
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount $ 361,015 $ 314,452
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio 0.0800 0.0800
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 473,832 $ 412,718
Total capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio 10.50% 10.50%
Total capital (to risk-weighted assets), For well capitalized purpose, Amount $ 451,269 $ 393,065
Total capital (to risk-weighted assets), For well capitalized purpose, Ratio 0.1000 0.1000
Tier 1 capital (to average assets), Actual, Amount $ 617,592 $ 479,506
Tier 1 capital (to average assets), Actual, Ratio 0.1369 0.1220
Tier 1 capital (to average assets), For capital adequacy purposes, Amount $ 270,761 $ 235,823
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio 0.0600 0.0600
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 383,578 $ 334,082
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio 8.50% 8.50%
Tier 1 capital (to average assets), For well capitalized purpose, Amount $ 361,015 $ 314,430
Tier 1 capital (to average assets), For well capitalized purposes, Ratio 0.0800 0.0800
Common equity tier 1 capital, Actual Amount $ 617,592 $ 479,506
Common equity tier 1 capital, Actual Ratio 0.1369 0.1220
Common equity tier 1 capital, For capital adequacy purposes, Amount $ 203,071 $ 176,867
Common equity tier 1 capital, For capital adequacy purpose, Ratio 4.50% 4.50%
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 315,888 $ 275,126
Common equity tier 1 capital (to risk-weighted assets), Required for capital1 adequacy purposes with capital buffer, Ratio 7.00% 7.50%
Common equity tier 1 capital, For well capitalized purpose, Amount $ 293,325 $ 255,475
Common equity tier 1 capital, For well capitalized purposes, Ratio 6.50% 6.50%
Tier 1 capital (to average assets), Actual, Amount $ 617,592 $ 479,506
Tier 1 capital (to average assets), Actual, Ratio 0.0850 0.0949
Tier 1 capital (to average assets), For capital adequacy purposes, Amount $ 290,646 $ 202,110
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio 0.0400 0.0400
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Amount $ 290,646 $ 202,110
Tier 1 capital (to average assets), Required for capital1 adequacy purposes with capital buffer, Ratio 4.00% 4.00%
Tier 1 capital (to average assets), For well capitalized purpose, Amount $ 363,307 $ 252,638
Tier 1 capital (to average assets), For well capitalized purposes, Ratio 0.0500 0.0500