Allowance for Credit Losses (“ACL”) on Loans - Amount of Loans Receivable Held-for-Investment and Related Allowances Per Loan Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 36,120	$ 34,780	$ 35,183	$ 37,535	$ 37,535
Charge-offs	(827)	(2,355)	(4,977)	(4,978)
Recoveries	528	230	947	301
Provisions (credit)	1,069	2,542	5,737	2,339
Ending balance	36,890	35,197	36,890	35,197	35,183
Originated Loans Net
Ending balance: individually evaluated for impairment	1,196		1,196		1,276
Ending balance: collectively evaluated for impairment	33,041		33,041		31,003
Ending balance: PCD loans evaluated for impairment	2,653		2,653		2,904
Total	3,900,346		3,900,346		4,022,224
Ending balance: individually evaluated for impairment	13,048		13,048		12,375
Ending balance: collectively evaluated for impairment	3,878,843		3,878,843		4,000,558
Ending balance: PCD loans evaluated for impairment	8,418		8,418		9,173
PPP loans not evaluated for impairment	37		37		118
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	33,403	31,835	32,279	34,450	34,450
Charge-offs	(484)	(2,355)	(4,634)	(4,978)	(7,009)
Recoveries	496	230	915	301
Provisions (credit)	822	2,563	5,677	2,500
Ending balance	34,237	32,273	34,237	32,273	32,279
Originated Loans Net
Ending balance: individually evaluated for impairment	1,196		1,196		1,276
Ending balance: collectively evaluated for impairment	33,041		33,041		31,003
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	3,891,928		3,891,928		4,013,051
Ending balance: individually evaluated for impairment	13,048		13,048		12,375
Ending balance: collectively evaluated for impairment	3,878,843		3,878,843		4,000,558
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	37		37		118
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real Estate
Originated Loans Net
Total	3,728,671		3,728,671		3,847,461
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,359	7,564	6,724	6,050	6,050
Charge-offs	(483)	(2,355)	(4,633)	(4,842)	(6,873)
Recoveries	483	124	872	158
Provisions (credit)	98	2,424	2,494	6,391
Ending balance	5,457	7,757	5,457	7,757	6,724
Originated Loans Net
Ending balance: individually evaluated for impairment	491		491		1,274
Ending balance: collectively evaluated for impairment	4,966		4,966		5,450
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	162,053		162,053		163,425
Ending balance: individually evaluated for impairment	3,293		3,293		4,070
Ending balance: collectively evaluated for impairment	158,723		158,723		159,237
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	37		37		118
Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3	3	4	6	6
Charge-offs	(1)	0	(1)	0
Recoveries	0	0	1	0
Provisions (credit)	0	(1)	(2)	(4)
Ending balance	2	2	2	2	4
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	2		2		4
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	1,204		1,204		2,165
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	1,204		1,204		2,165
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	0		0		0
PCD loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,717	2,945	2,904	3,085	3,085
Charge-offs	(343)	0	(343)	0
Recoveries	32	0	32	0
Provisions (credit)	247	(21)	60	(161)
Ending balance	2,653	2,924	2,653	2,924	2,904
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	0		0		0
Ending balance: PCD loans evaluated for impairment	2,653		2,653		2,904
Total	8,418		8,418		9,173
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	0		0		0
Ending balance: PCD loans evaluated for impairment	8,418		8,418		9,173
PPP loans not evaluated for impairment	0		0		0
Commercial | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	22,770	19,306	20,949	23,255	23,255
Charge-offs	0	0	0	(136)
Recoveries	13	14	42	42
Provisions (credit)	885	693	2,677	(3,148)
Ending balance	23,668	20,013	23,668	20,013	20,949
Originated Loans Net
Ending balance: individually evaluated for impairment	705		705		0
Ending balance: collectively evaluated for impairment	22,963		22,963		20,949
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	3,335,028		3,335,028		3,487,285
Ending balance: individually evaluated for impairment	8,483		8,483		7,730
Ending balance: collectively evaluated for impairment	3,326,545		3,326,545		3,479,555
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	0		0		0
One-to-four family residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,444	2,292	2,245	3,285	3,285
Charge-offs	0	0	0	0
Recoveries	0	0	0	9
Provisions (credit)	(120)	(194)	79	(1,196)
Ending balance	2,324	2,098	2,324	2,098	2,245
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	2,324		2,324		2,245
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	165,969		165,969		150,217
Ending balance: individually evaluated for impairment	1,255		1,255		555
Ending balance: collectively evaluated for impairment	164,714		164,714		149,662
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	0		0		0
Home equity and lines of credit | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,729	2,562	2,254	1,705	1,705
Charge-offs	0	0	0	0
Recoveries	0	92	0	92
Provisions (credit)	(38)	(357)	437	500
Ending balance	2,691	2,297	2,691	2,297	2,254
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		2
Ending balance: collectively evaluated for impairment	2,691		2,691		2,252
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	193,309		193,309		174,062
Ending balance: individually evaluated for impairment	17		17		20
Ending balance: collectively evaluated for impairment	193,292		193,292		174,042
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	0		0		0
Construction and land | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	98	108	103	149	149
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credit)	(3)	(2)	(8)	(43)
Ending balance	95	$ 106	95	$ 106	103
Originated Loans Net
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	95		95		103
Ending balance: PCD loans evaluated for impairment	0		0		0
Total	34,365		34,365		35,897
Ending balance: individually evaluated for impairment	0		0		0
Ending balance: collectively evaluated for impairment	34,365		34,365		35,897
Ending balance: PCD loans evaluated for impairment	0		0		0
PPP loans not evaluated for impairment	$ 0		$ 0		$ 0