Loans and Loans Held for Sale - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unearned income	$ 7,500	$ 14,100
Purchase accounting fair value adjustments	4,700	6,700
Financing receivable, excluding accrued interest, after allowance for credit loss	7,082,629	6,901,414
Portfolio loans, net of unearned income	$ 7,183,969	$ 6,999,990
Number of modified loans | loan	0	8
Number of commitments to lend additional funds | loan	16	12
Commitment to lend additional funds	$ 400	$ 2,600
Number of TDRs returned back to accruing status | loan	1	0
Financial receivable trouble debt restructuring reclassified to accruing trouble debt restructuring status	$ 200
Minimum period of loan payment defaults following restructure for TDRs to be in default (in days)	90 days
Number of TDRs defaulted that were restructured within the last 12 months prior to defaulting | loan	0	0
CARES Act, Paycheck Protection Program Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of modified loans | loan		8
Modified loans		$ 28,800
Commercial | CARES Act, Paycheck Protection Program Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, excluding accrued interest, after allowance for credit loss	$ 4,000	88,300
Modified loans		$ 28,800