Deposits (Summary of Average Balances and Weighted Average Rates Paid on Deposits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Demand deposits:
Non-interest bearing, average balance	$ 8,861,111	$ 8,480,964	$ 5,760,309
Non-interest bearing, average rate (in Percent)	0.00%	0.00%	0.00%
Interest bearing, average balance	$ 2,538,906	$ 3,027,649	$ 2,582,951
Interest-bearing, average rate (in Percent)	0.55%	0.28%	0.75%
Savings and Money Market, average balance	$ 12,874,240	$ 13,339,651	$ 10,843,894
Weighted Average Rate Domestic Deposit Savings and Money Market	1.02%	0.32%	0.79%
Time, average balance	$ 3,338,671	$ 3,490,082	$ 6,617,939
Weighted Average Rate Domestic Deposit, Time Deposits	1.06%	0.46%	1.43%
Deposits, average balance	$ 27,612,928	$ 28,338,346	$ 25,805,093
Weighted Average Rate Domestic Deposits	0.65%	0.24%	0.77%