Deposits (Schedule of Detailed Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Banking And Thrift Interest [Abstract]
Noninterest-bearing deposits	$ 13,645,113	$ 14,392,808
Interest-bearing retail transaction and savings deposits	10,757,495	11,677,333
Interest-bearing public fund deposits, Public fund transaction and savings deposits	3,132,828	3,216,651
Interest-bearing public fund deposits, Public fund time deposits	111,397	77,956
Total interest-bearing public fund deposits	3,244,225	3,294,607
Retail time deposits	1,418,596	1,091,959
Brokered time deposits	4,920	9,190
Total interest-bearing deposits	15,425,236	16,073,089
Total deposits	$ 29,070,349	$ 30,465,897