Loans and Allowance for Credit Losses - Changes in Allowance for Credit Losses by Class of Financing Receivable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 134,192	$ 125,559
Provision for credit losses	4,997	(6,129)
Recoveries of loans previously charged-off	387	1,198
Loans charged off	(767)	(579)
Balance at end of period	138,809	120,049
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	11,106	15,751
Provision for credit losses	(10)	(4,006)
Recoveries of loans previously charged-off	67	958
Loans charged off	(46)	(4)
Balance at end of period	11,117	12,699
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	39,808	28,576
Provision for credit losses	1,217	3,206
Recoveries of loans previously charged-off	0	0
Loans charged off	0	0
Balance at end of period	41,025	31,782
Residential real estate: | 1-to-4 family mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	26,141	19,104
Provision for credit losses	1,073	1,908
Recoveries of loans previously charged-off	15	12
Loans charged off	(16)	0
Balance at end of period	27,213	21,024
Residential real estate: | Residential line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	7,494	5,903
Provision for credit losses	1,540	641
Recoveries of loans previously charged-off	0	1
Loans charged off	0	0
Balance at end of period	9,034	6,545
Residential real estate: | Multi-family mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	6,490	6,976
Provision for credit losses	129	(578)
Recoveries of loans previously charged-off	0	0
Loans charged off	0	0
Balance at end of period	6,619	6,398
Commercial real estate: | Owner-occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	7,783	12,593
Provision for credit losses	103	(4,187)
Recoveries of loans previously charged-off	66	10
Loans charged off	0	0
Balance at end of period	7,952	8,416
Commercial real estate: | Non-owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	21,916	25,768
Provision for credit losses	(48)	(4,478)
Recoveries of loans previously charged-off	0	0
Loans charged off	0	0
Balance at end of period	21,868	21,290
Consumer and other
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	13,454	10,888
Provision for credit losses	993	1,365
Recoveries of loans previously charged-off	239	217
Loans charged off	(705)	(575)
Balance at end of period	$ 13,981	$ 11,895