Regulatory Capital - Summary of Regulatory Capital Requirement (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets), Actual, Amount	$ 733,695	$ 708,198
Total capital (to risk-weighted assets), Actual, Ratio	0.1521	0.1571
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 382,005	$ 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	$ 501,382	$ 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	$ 679,232	$ 661,729
Tier 1 capital (to average assets), Actual, Ratio	0.1408	0.1468
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 286,504	$ 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	$ 405,880	$ 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	$ 541,696	$ 541,920
Common equity tier 1 capital, Actual Ratio	0.1164	0.1202
Common equity tier 1 capital, For capital adequacy purposes, Amount	$ 214,878	$ 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	$ 324,254	$ 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	$ 679,232	$ 661,729
Tier 1 capital (to average assets), Actual, Ratio	0.0970	0.0905
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 284,361	$ 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	$ 284,361	$ 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	$ 679,970	$ 664,061
Total capital (to risk-weighted assets), Actual, Ratio	0.1425	0.1472
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 381,711	$ 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	$ 500,996	$ 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	$ 477,139	$ 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	$ 631,371	$ 617,592
Tier 1 capital (to average assets), Actual, Ratio	0.1323	0.1369
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 286,284	$ 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	$ 405,568	$ 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	$ 381,711	$ 361,015
Tier 1 capital (to average assets), For well capitalized purposes, Ratio	0.0800	0.0800
Common equity tier 1 capital, Actual Amount	$ 631,371	$ 617,592
Common equity tier 1 capital, Actual Ratio	0.1323	0.1369
Common equity tier 1 capital, For capital adequacy purposes, Amount	$ 214,713	$ 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	$ 333,998	$ 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	$ 310,141	$ 293,325
Common equity tier 1 capital, For well capitalized purposes, Ratio	6.50%	6.50%
Tier 1 capital (to average assets), Actual, Amount	$ 631,371	$ 617,592
Tier 1 capital (to average assets), Actual, Ratio	0.0883	0.0850
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 286,014	$ 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	$ 286,014	$ 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	$ 357,517	$ 363,307
Tier 1 capital (to average assets), For well capitalized purposes, Ratio	0.0500	0.0500