Regulatory Capital - Schedule of Capital Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity	$ 533,271	$ 522,783	$ 515,228	$ 511,135	$ 501,578	$ 363,140	$ 361,638	$ 364,285
Goodwill	(61,397)			(63,266)
Core deposit intangible	(30,572)			(38,069)
DTAs that arise from net operating loss and tax credit carry forwards	(426)			(8,977)
AOCI losses	5,526			7,494
Common Tier 1 Capital to RWA, amount	446,402			408,317
TRUPs	29,768			29,530
Tier 1 Capital	476,170			437,847
Allowable reserve for credit losses and other Tier 2 adjustments	59,806			58,586
Subordinated debt, net	43,688			43,139
Total Capital	579,664			539,572
Risk-Weighted Assets (“RWA”)	4,816,165			4,697,504
Average Assets (“AA”)	5,729,576			5,649,116
The Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity	595,954			570,100
Goodwill	(61,397)			(63,266)
Core deposit intangible	(30,572)			(38,069)
DTAs that arise from net operating loss and tax credit carry forwards	0			(6,059)
AOCI losses	5,526			7,494
Common Tier 1 Capital to RWA, amount	509,511			470,200
TRUPs	0			0
Tier 1 Capital	509,511			470,200
Allowable reserve for credit losses and other Tier 2 adjustments	59,806			58,586
Subordinated debt, net	0			0
Total Capital	569,317			528,786
Risk-Weighted Assets (“RWA”)	4,808,058			4,693,009
Average Assets (“AA”)	$ 5,721,995			$ 5,644,930