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Regulatory Capital (Details)
$ in Thousands
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]      
Total capital (to risk-weighted assets), actual, amount $ 802,395 $ 789,786 $ 782,598
Total capital (to risk-weighted assets), actual, ratio 0.1341 0.1375 0.1404
Total capital (to risk-weighted assets), for capital adequacy purposes, amount $ 478,786 $ 459,485 $ 446,000
Total capital (to risk-weighted assets), For capital adequacy purposes, ratio 0.0800 0.0800 0.0800
Total capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, amount $ 628,407 $ 603,074 $ 585,374
Total capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio 10.50% 10.50% 10.50%
Tier 1 capital (to average assets), actual, amount $ 693,807 $ 683,015 $ 676,411
Tier 1 capital (to average assets), actual, ratio 0.1159 0.1189 0.1213
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 359,090 $ 344,614 $ 334,500
Tier 1 capital (to average assets), for capital adequacy purpose, ratio 0.0600 0.0600 0.0600
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, amount $ 508,711 $ 488,203 $ 473,874
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, ratio 8.50% 8.50% 8.50%
Common equity tier 1 capital, actual amount $ 636,438 $ 625,700 $ 619,153
Common equity tier 1 capital, actual ratio 0.1063 0.1089 0.1111
Common equity tier 1 capital, for capital adequacy purposes, amount $ 269,317 $ 258,460 $ 250,875
Common equity tier 1 capital, for capital adequacy purpose, ratio 4.50% 4.50% 4.50%
Common equity tier 1 capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, amount $ 418,938 $ 402,049 $ 390,250
Common equity tier 1 capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio 7.00% 7.00% 7.00%
Tier 1 capital (to average assets), actual, amount $ 693,807 $ 683,015 $ 676,411
Tier 1 capital (to average assets), actual, ratio 0.0902 0.0891 0.0861
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 307,743 $ 306,716 $ 314,306
Tier 1 capital (to average assets), for capital adequacy purpose, ratio 0.0400 0.0400 0.0400
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, amount $ 307,743 $ 306,716 $ 314,306
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, ratio 4.00% 4.00% 4.00%
Consolidated (As Reported)      
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]      
Total capital (to risk-weighted assets), actual, amount   $ 793,567 $ 786,436
Total capital (to risk-weighted assets), actual, ratio   0.1382 0.1411
Total capital (to risk-weighted assets), for capital adequacy purposes, amount   $ 459,485 $ 446,000
Total capital (to risk-weighted assets), For capital adequacy purposes, ratio   0.0800 0.0800
Total capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, amount   $ 603,074 $ 585,374
Total capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio   10.50% 10.50%
Tier 1 capital (to average assets), actual, amount   $ 742,430 $ 735,792
Tier 1 capital (to average assets), actual, ratio   0.1293 0.1320
Tier 1 capital (to average assets), for capital adequacy purposes, amount   $ 344,614 $ 334,500
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   $ 488,203 $ 473,874
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), actual, amount   $ 742,430 $ 735,792
Tier 1 capital (to average assets), actual, ratio   0.0968 0.0936
Tier 1 capital (to average assets), for capital adequacy purposes, amount   $ 306,716 $ 314,306
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   $ 306,716 $ 314,306
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 $ 732,301 $ 721,018 $ 714,402
Total capital (to risk-weighted assets), actual, ratio 0.1226 0.1259 0.1287
Total capital (to risk-weighted assets), for capital adequacy purposes, amount $ 477,761 $ 458,163 $ 444,147
Total capital (to risk-weighted assets), For capital adequacy purposes, ratio 0.0800 0.0800 0.0800
Total capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, amount $ 627,061 $ 601,338 $ 582,943
Total capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio 10.50% 10.50% 10.50%
Total capital (to risk-weighted assets), for well capitalized purpose, amount $ 597,201 $ 572,703 $ 555,184
Total capital (to risk-weighted assets), for well capitalized purpose, ratio 0.1000 0.1000 0.1000
Tier 1 capital (to average assets), actual, amount $ 679,381 $ 669,881 $ 663,758
Tier 1 capital (to average assets), actual, ratio 0.1138 0.1170 0.1196
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 358,321 $ 343,622 $ 333,111
Tier 1 capital (to average assets), for capital adequacy purpose, ratio 0.0600 0.0600 0.0600
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, amount $ 507,621 $ 486,798 $ 471,907
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, ratio 8.50% 8.50% 8.50%
Tier 1 capital (to average assets), for well capitalized purpose, amount $ 477,761 $ 458,163 $ 444,147
Tier 1 capital (to average assets), for well capitalized purposes, ratio 0.0800 0.0800 0.0800
Common equity tier 1 capital, actual amount $ 679,381 $ 669,881 $ 663,758
Common equity tier 1 capital, actual ratio 0.1138 0.1170 0.1196
Common equity tier 1 capital, for capital adequacy purposes, amount $ 268,741 $ 257,716 $ 249,833
Common equity tier 1 capital, for capital adequacy purpose, ratio 4.50% 4.50% 4.50%
Common equity tier 1 capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, amount $ 418,041 $ 400,892 $ 388,629
Common equity tier 1 capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio 7.00% 7.00% 7.00%
Common equity tier 1 capital, for well capitalized purpose, amount $ 388,181 $ 372,257 $ 360,870
Common equity tier 1 capital, for well capitalized purposes, ratio 6.50% 6.50% 6.50%
Tier 1 capital (to average assets), actual, amount $ 679,381 $ 669,881 $ 663,758
Tier 1 capital (to average assets), actual, ratio 0.0884 0.0863 0.0841
Tier 1 capital (to average assets), for capital adequacy purposes, amount $ 307,335 $ 310,592 $ 315,550
Tier 1 capital (to average assets), for capital adequacy purpose, ratio 0.0400 0.0400 0.0400
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, amount $ 307,335 $ 310,592 $ 315,550
Tier 1 capital (to average assets), required for capital1 adequacy purposes with capital buffer, ratio 4.00% 4.00% 4.00%
Tier 1 capital (to average assets), for well capitalized purpose, amount $ 384,168 $ 388,240 $ 394,438
Tier 1 capital (to average assets), for well capitalized purposes, ratio 0.0500 0.0500 0.0500