Deposits (Schedule of Detailed Deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Banking and Thrift, Interest [Abstract]
Noninterest-bearing deposits	$ 10,374,991	$ 10,597,461
Interest-bearing retail transaction and savings deposits	11,998,892	11,327,725
Interest-bearing public fund deposits, Public fund transaction and savings deposits	3,120,389	3,127,427
Interest-bearing public fund deposits, Public fund time deposits	96,925	85,072
Total interest-bearing public fund deposits	3,217,314	3,212,499
Retail time deposits	3,688,577	4,348,265
Brokered time deposits	0	6,901
Total interest-bearing deposits	18,904,783	18,895,390
Total deposits	$ 29,279,774	$ 29,492,851