Loans and Allowance for Credit Losses on Loans - Allowance Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 253,469	$ 211,866
Provision for credit losses on loans	47,431	61,472
Charge-offs	56,727	23,569
Recoveries	5,800	3,700
Net charge-offs (recoveries)	50,927	19,869
Ending balance	249,973	253,469
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	185,303	154,360
Provision for credit losses on loans	31,529	50,485
Charge-offs	51,186	23,219
Recoveries	5,791	3,677
Net charge-offs (recoveries)	45,395	19,542
Ending balance	171,437	185,303
Mortgage finance
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,745	6,083
Provision for credit losses on loans	(6,572)	4,662
Charge-offs	0	0
Recoveries	0	0
Net charge-offs (recoveries)	0	0
Ending balance	4,173	10,745
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	54,268	48,247
Provision for credit losses on loans	23,057	6,371
Charge-offs	5,500	350
Recoveries	4	0
Net charge-offs (recoveries)	5,496	350
Ending balance	71,829	54,268
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,153	3,176
Provision for credit losses on loans	(583)	(46)
Charge-offs	41	0
Recoveries	5	23
Net charge-offs (recoveries)	36	(23)
Ending balance	$ 2,534	$ 3,153