Deposit Accounts - Deposit Accounts and Weighted Average Interest Rates (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Transaction accounts
Noninterest-bearing checking	$ 4,617,013	$ 4,932,817
Interest-bearing checking	2,898,810	2,899,621
Money market	4,577,646	4,572,693
Savings	260,283	295,749
Total transaction accounts	12,353,752	12,700,880
Time deposit accounts
$250,000 or less	1,045,605	853,013
Greater than $250,000	1,064,345	1,441,733
Total time deposit accounts	2,109,950	2,294,746
Total deposits	$ 14,463,702	$ 14,995,626
Total transaction accounts
Noninterest-bearing checking (as a percent)	31.90%	32.90%
Interest-bearing checking (as a percent)	20.00%	19.30%
Money market (as a percent)	31.70%	30.50%
Savings (as a percent)	1.80%	2.00%
Total transaction accounts (as a percent)	85.40%	84.70%
Total time deposit accounts
Less than $250,000 (as a percent)	7.20%	5.70%
Greater than $250,000 (as a percent)	7.40%	9.60%
Total time deposit accounts (as a percent)	14.60%	15.30%
Total deposits (as a percent)	100.00%	100.00%
Transaction accounts
Noninterest-bearing checking (as a percent)	0.00%	0.00%
Interest-bearing checking (as a percent)	1.58%	1.38%
Money market (as a percent)	2.34%	2.00%
Savings (as a percent)	0.37%	0.29%
Total transaction accounts (as a percent)	1.24%	1.04%
Time deposit accounts
Less than $250,000 (as a percent)	4.38%	4.04%
Greater than $250,000 (as a percent)	4.62%	4.56%
Total time deposit accounts (as a percent)	4.50%	4.37%
Total deposits (as a percent)	1.72%	1.55%