Loans and Allowance for Credit Losses on Loans HFI - Schedule of Changes in Allowance for Credit Losses on Loans HFI by Class of Financing Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 140,664	$ 126,272	$ 134,192	$ 125,559
Provision for (reversal of) credit losses on loans HFI	6,031	8,189	13,603	10,241
Recoveries of loans previously charged-off	235	476	794	2,104
Loans charged off	(796)	(461)	(2,455)	(3,428)
Balance at end of period	146,134	134,476	146,134	134,476
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	11,311	10,191	11,106	15,751
Provision for (reversal of) credit losses on loans HFI	6,293	5	6,475	(4,784)
Recoveries of loans previously charged-off	112	342	192	1,326
Loans charged off	(154)	0	(211)	(1,755)
Balance at end of period	17,562	10,538	17,562	10,538
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	39,920	38,383	39,808	28,576
Provision for (reversal of) credit losses on loans HFI	(2,025)	3,044	(1,923)	12,840
Recoveries of loans previously charged-off	0	0	10	11
Loans charged off	0	0	0	0
Balance at end of period	37,895	41,427	37,895	41,427
Residential real estate: | 1-to-4 family mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	27,407	21,398	26,141	19,104
Provision for (reversal of) credit losses on loans HFI	(1,724)	3,975	(466)	6,266
Recoveries of loans previously charged-off	16	13	56	39
Loans charged off	(4)	(20)	(36)	(43)
Balance at end of period	25,695	25,366	25,695	25,366
Residential real estate: | Residential line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	9,185	6,875	7,494	5,903
Provision for (reversal of) credit losses on loans HFI	(23)	77	1,668	1,032
Recoveries of loans previously charged-off	1	0	1	17
Loans charged off	0	0	0	0
Balance at end of period	9,163	6,952	9,163	6,952
Residential real estate: | Multi-family mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	6,828	6,503	6,490	6,976
Provision for (reversal of) credit losses on loans HFI	20	(629)	358	(1,102)
Recoveries of loans previously charged-off	0	0	0	0
Loans charged off	0	0	0	0
Balance at end of period	6,848	5,874	6,848	5,874
Commercial real estate: | Owner-occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	8,467	7,329	7,783	12,593
Provision for (reversal of) credit losses on loans HFI	2,046	688	2,792	(4,601)
Recoveries of loans previously charged-off	13	51	95	76
Loans charged off	0	0	(144)	0
Balance at end of period	10,526	8,068	10,526	8,068
Commercial real estate: | Non-owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	22,877	22,536	21,916	25,768
Provision for (reversal of) credit losses on loans HFI	(130)	247	831	(2,985)
Recoveries of loans previously charged-off	0	0	0	0
Loans charged off	0	0	0	0
Balance at end of period	22,747	22,783	22,747	22,783
Consumer and other
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	14,669	13,057	13,454	10,888
Provision for (reversal of) credit losses on loans HFI	1,574	782	3,868	3,575
Recoveries of loans previously charged-off	93	70	440	635
Loans charged off	(638)	(441)	(2,064)	(1,630)
Balance at end of period	$ 15,698	$ 13,468	$ 15,698	$ 13,468