Deposits (Summary of Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Balance:
Non-interest-bearing	$ 12,668,160	$ 14,179,980
NOW and interest-bearing demand deposits	5,591,986	4,646,944
Wealth management deposits	2,463,833	2,612,759
Money market	12,886,795	12,840,432
Savings	4,556,635	3,846,681
Time certificates of deposit	4,735,135	3,968,789
Total deposits	$ 42,902,544	$ 42,095,585
Mix:
Non-interest bearing	30.00%	34.00%
NOW and interest-bearing demand deposits	13.00%	11.00%
Wealth management deposits	5.00%	6.00%
Money market	30.00%	31.00%
Savings	11.00%	9.00%
Time certificates of deposit	11.00%	9.00%
Total deposits	100.00%	100.00%