Allowance for Credit Losses - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 41,468	$ 44,732	$ 48,305	$ 47,052
Provision for credit losses			(4,750)	(3,244)
Provision for credit losses	(1,050)	(1,500)
Loans charged off	(5,653)	(1,614)	(11,318)	(5,103)
Recoveries	2,630	1,344	7,258	4,257
Ending Balance	39,495	42,962	39,495	42,962
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	16,469	15,693	18,883	16,901
Provision for credit losses			(3,835)	(2,067)
Provision for credit losses	1,403	(531)
Loans charged off	(2,406)	(313)	(3,659)	(612)
Recoveries	634	182	1,905	809
Ending Balance	13,294	15,031	13,294	15,031
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14,168	17,837	18,316	19,142
Provision for credit losses			(3,952)	(2,577)
Provision for credit losses	(297)	(1,387)
Loans charged off	(57)	(61)	(579)	(492)
Recoveries	55	130	678	446
Ending Balance	14,463	16,519	14,463	16,519
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	10,584	10,988	10,721	11,009
Provision for credit losses			3,218	941
Provision for credit losses	(2,199)	173
Loans charged off	(3,190)	(1,240)	(7,080)	(3,999)
Recoveries	1,941	1,032	4,675	3,002
Ending Balance	11,534	10,953	11,534	10,953
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	247	214	385
Provision for credit losses			(181)	459
Provision for credit losses	43	245
Ending Balance	$ 204	$ 459	$ 204	$ 459