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Regulatory Capital - Schedule of Regulatory Capital Requirement (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Total capital (to risk-weighted assets), actual, amount $ 786,436 $ 776,390
Total capital (to risk-weighted assets), actual, ratio 0.1411 0.1437
Total capital (to risk-weighted assets), for capital adequacy purposes, amount $ 446,000 $ 432,172
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 $ 585,374 $ 567,226
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 $ 735,792 $ 729,835
Tier 1 capital (to average assets), actual, ratio 0.1320 0.1351
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 334,500 $ 324,129
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 $ 473,874 $ 459,183
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 $ 619,153 $ 609,630
Common equity tier 1 capital, actual ratio 0.1111 0.1128
Common equity tier 1 capital, for capital adequacy purposes, amount $ 250,875 $ 243,097
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 $ 390,250 $ 378,151
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 $ 735,792 $ 729,835
Tier 1 capital (to average assets), actual, ratio 0.0936 0.1003
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 314,306 $ 291,122
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 $ 314,306 $ 291,122
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 $ 714,402 $ 726,339
Total capital (to risk-weighted assets), actual, ratio 0.1287 0.1359
Total capital (to risk-weighted assets), for capital adequacy purposes, amount $ 444,147 $ 427,456
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 $ 582,943 $ 561,036
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 $ 555,184 $ 534,320
Total capital (to risk-weighted assets), for well capitalized purpose, ratio 0.1000 0.1000
Tier 1 capital (to average assets), actual, amount $ 663,758 $ 679,784
Tier 1 capital (to average assets), actual, ratio 0.1196 0.1272
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 333,111 $ 320,592
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 $ 471,907 $ 454,172
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 $ 444,147 $ 427,456
Tier 1 capital (to average assets), for well capitalized purposes, ratio 0.0800 0.0800
Common equity tier 1 capital, actual amount $ 663,758 $ 679,784
Common equity tier 1 capital, actual ratio 0.1196 0.1272
Common equity tier 1 capital, for capital adequacy purposes, amount $ 249,833 $ 240,444
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 $ 388,629 $ 374,024
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 $ 360,870 $ 347,308
Common equity tier 1 capital, for well capitalized purposes, ratio 6.50% 6.50%
Tier 1 capital (to average assets), actual, amount $ 663,758 $ 679,784
Tier 1 capital (to average assets), actual, ratio 0.0841 0.0889
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 315,550 $ 305,996
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 $ 315,550 $ 305,999
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 $ 394,438 $ 382,495
Tier 1 capital (to average assets), for well capitalized purposes, ratio 0.0500 0.0500