Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Balance:
Non-interest-bearing	$ 10,739,132	$ 10,420,401	$ 10,347,006
NOW and interest-bearing demand deposits	5,466,932	5,797,649	6,006,114
Wealth management deposits	1,303,354	1,614,499	1,788,099
Money market	17,713,726	15,149,215	14,478,504
Savings	6,183,249	5,790,334	5,584,294
Time certificates of deposit	9,998,573	6,625,072	6,788,669
Total deposits	$ 51,404,966	$ 45,397,170	$ 44,992,686
Mix:
Non-interest-bearing	21.00%	23.00%	23.00%
NOW and interest-bearing demand deposits	11.00%	13.00%	13.00%
Wealth management deposits	3.00%	4.00%	4.00%
Money market	34.00%	33.00%	32.00%
Savings	12.00%	13.00%	13.00%
Time certificates of deposit	19.00%	14.00%	15.00%
Total deposits	100.00%	100.00%	100.00%