Allowance for Credit Losses - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 39,620	$ 40,516	$ 39,779	$ 48,305
Provision for credit losses	1,800	750	3,600	(5,800)
Loans charged -off	(3,543)	(2,411)	(7,919)	(5,665)
Recoveries	2,030	2,613	4,447	4,628
Ending Balance	39,907	41,468	39,907	41,468
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,790	17,300	12,949	18,883
Provision for credit losses	(377)	(1,392)	(431)	(2,432)
Loans charged -off	(209)	(370)	(515)	(1,253)
Recoveries	246	931	447	1,271
Ending Balance	12,450	16,469	12,450	16,469
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	15,059	13,235	14,568	18,316
Provision for credit losses	166	895	666	(4,249)
Loans charged -off	(63)	(56)	(142)	(522)
Recoveries	106	94	176	623
Ending Balance	15,268	14,168	15,268	14,168
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	11,513	9,662	12,104	10,721
Provision for credit losses	1,733	1,319	2,987	1,019
Loans charged -off	(3,271)	(1,985)	(7,262)	(3,890)
Recoveries	1,678	1,588	3,824	2,734
Ending Balance	11,653	10,584	11,653	10,584
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	258	319	158	385
Provision for credit losses	278	(72)	378	(138)
Ending Balance	$ 536	$ 247	$ 536	$ 247