Allowance for Credit Losses - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 39,779	$ 48,305
Provision for credit losses	(1,800)	(6,550)
Loans charged off	(4,376)	(3,254)
Recoveries	2,417	2,015
Ending Balance	39,620	40,516
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,949	18,883
Provision for credit losses	54	(1,040)
Loans charged off	(306)	(883)
Recoveries	201	340
Ending Balance	12,790	17,300
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14,568	18,316
Provision for credit losses	(500)	(5,144)
Loans charged off	(79)	(466)
Recoveries	70	529
Ending Balance	15,059	13,235
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,104	10,721
Provision for credit losses	(1,254)	(300)
Loans charged off	(3,991)	(1,905)
Recoveries	2,146	1,146
Ending Balance	11,513	9,662
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	158	385
Provision for credit losses	(100)	(66)
Ending Balance	$ 258	$ 319