Financial Instruments with Off-Balance Sheet Risk (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Beginning balance	$ 46,362	$ 21,793
Provision for credit losses	(1,043)	22,977
Ending balance	45,319	44,770
Commitments to extend credit
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Off-balance sheet liability	8,934,459		$ 9,749,085
Standby letters of credit
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Off-balance sheet liability	518,824		$ 595,079
Commercial
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Beginning balance	36,040	16,550
Provision for credit losses	1,222	17,187
Ending balance	37,262	33,737
Mortgage finance
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Beginning balance	6	0
Provision for credit losses	23	0
Ending balance	29	0
Commercial real estate
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Beginning balance	10,147	5,222
Provision for credit losses	(2,363)	5,693
Ending balance	7,784	10,915
Consumer
Allowance For Off-Balance Sheet Credit Losses [Roll Forward]
Beginning balance	169	21
Provision for credit losses	75	97
Ending balance	$ 244	$ 118