Loans - 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]
Balance at beginning of period	$ 52,435	$ 47,252
Additions (deductions)
Provision for credit losses	(832)	(1,573)
Recoveries credited to the allowance	578	621
Loans charged against the allowance	(1,631)	(673)
Balance at end of period	50,550	45,627
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	13,817	11,519
Additions (deductions)
Provision for credit losses	648	(852)
Recoveries credited to the allowance	28	77
Loans charged against the allowance	(960)	0
Balance at end of period	13,533	10,744
Mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	21,633	19,221
Additions (deductions)
Provision for credit losses	(1,574)	(178)
Recoveries credited to the allowance	84	171
Loans charged against the allowance	(30)	(6)
Balance at end of period	20,113	19,208
Installment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	4,290	3,749
Additions (deductions)
Provision for credit losses	(61)	149
Recoveries credited to the allowance	466	373
Loans charged against the allowance	(641)	(667)
Balance at end of period	4,054	3,604
Subjective Allocation
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	12,695	12,763
Additions (deductions)
Provision for credit losses	155	(692)
Recoveries credited to the allowance	0	0
Loans charged against the allowance	0	0
Balance at end of period	$ 12,850	$ 12,071