Regulatory Capital - Summary of Regulatory Capital Requirement (Details) $ in Thousands	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), actual, amount	$ 760,102	$ 708,198
Total capital (to risk-weighted assets), actual, ratio	0.1444	0.1571
Total capital (to risk-weighted assets), for capital adequacy purposes, amount	$ 421,180	$ 360,737
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	$ 552,798	$ 473,468
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	$ 712,642	$ 661,729
Tier 1 capital (to average assets), actual, ratio	0.1354	0.1468
Tier 1 capital (to average assets), for capital adequacy purposes, amount	$ 315,885	$ 270,553
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	$ 447,503	$ 383,284
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	$ 592,723	$ 541,920
Common equity tier 1 capital, actual ratio	0.1126	0.1202
Common equity tier 1 capital, for capital adequacy purposes, amount	$ 236,914	$ 202,915
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 capital adequacy purposes with capital buffer, amount	$ 368,532	$ 315,645
Common equity tier 1 capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio	7.00%	7.00%
Tier 1 capital (to average assets), actual, amount	$ 712,642	$ 661,729
Tier 1 capital (to average assets), actual, ratio	0.0956	0.0905
Tier 1 capital (to average assets), for capital adequacy purposes, amount	$ 298,240	$ 292,335
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	$ 298,240	$ 292,335
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	$ 711,478	$ 664,061
Total capital (to risk-weighted assets), actual, ratio	0.1365	0.1472
Total capital (to risk-weighted assets), for capital adequacy purposes, amount	$ 416,859	$ 361,015
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	$ 547,127	$ 473,832
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	$ 521,073	$ 451,269
Total capital (to risk-weighted assets), for well capitalized purpose, ratio	0.1000	0.1000
Tier 1 capital (to average assets), actual, amount	$ 664,018	$ 617,592
Tier 1 capital (to average assets), actual, ratio	0.1274	0.1369
Tier 1 capital (to average assets), for capital adequacy purposes, amount	$ 312,644	$ 270,761
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	$ 442,912	$ 383,578
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	$ 416,859	$ 361,015
Tier 1 capital (to average assets), for well capitalized purposes, ratio	0.0800	0.0800
Common equity tier 1 capital, actual amount	$ 664,018	$ 617,592
Common equity tier 1 capital, actual ratio	0.1274	0.1369
Common equity tier 1 capital, for capital adequacy purposes, amount	$ 234,483	$ 203,071
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 capital adequacy purposes with capital buffer, amount	$ 364,751	$ 315,888
Common equity tier 1 capital (to risk-weighted assets), required for capital adequacy purposes with capital buffer, ratio	7.00%	7.00%
Common equity tier 1 capital, for well capitalized purpose, amount	$ 338,698	$ 293,325
Common equity tier 1 capital, for well capitalized purposes, ratio	6.50%	6.50%
Tier 1 capital (to average assets), actual, amount	$ 664,018	$ 617,592
Tier 1 capital (to average assets), actual, ratio	0.0884	0.0850
Tier 1 capital (to average assets), for capital adequacy purposes, amount	$ 300,512	$ 290,646
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	$ 300,512	$ 290,646
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	$ 375,641	$ 363,307
Tier 1 capital (to average assets), for well capitalized purposes, ratio	0.0500	0.0500