Loans and Allowance for Credit Losses Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 262,887	$ 269,805	$ 263,534	$ 291,940	$ 291,940
Loans charged off	3,724	2,234	7,242	19,958
Recoveries of loans previously charged off	3,272	4,539	11,593	9,128
Total net (charge-offs) recoveries	(452)	2,305	4,351	(10,830)
Provision for credit losses	11,004	(600)	5,554	(9,600)
Ending balance	282,528	271,510	282,528	271,510	263,534
Provision for credit losses	18,958	(600)	13,508	(9,600)
ACL - loans	266,838		266,838		$ 249,001
Prudential
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	7,954	0	7,954	0
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	1,135	0	1,135	0
Off-Balance Sheet
Allowance for Loan and Lease Losses [Roll Forward]
Provision for credit losses	$ 1,400	$ 10	$ 1,200	$ 400