Loans and Asset Quality Information - Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 52,388	$ 21,398	$ 21,039
Charge-offs	(7,602)	(8,502)	(6,303)
Recoveries	4,922	4,453	4,399
Provision for credit losses on changes in unfunded commitments	9,611	35,039	2,263
Ending balance	78,789	52,388	$ 21,398
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14,575
Ending balance		14,575
Unfunded Loan Commitment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	582
Charge-offs	0
Recoveries	0
Day 2 provision for credit losses on unfunded commitments acquired from Select	3,982
Provision for credit losses on changes in unfunded commitments	1,438
Ending balance	13,506	582
Unfunded Loan Commitment | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 7,504
Ending balance		$ 7,504