Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	$ 2,435,663	$ 2,684,779
Securities Held to Maturity, Gross Unrealized Gains	169	1,431
Securities Held to Maturity, Gross Unrealized Losses	202,306	200,292
Securities Held to Maturity, Fair Value	2,233,526	2,485,918
U.S. Treasury And Government Agency Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	394,689	413,490
Securities Held to Maturity, Gross Unrealized Gains	0	179
Securities Held to Maturity, Gross Unrealized Losses	45,876	43,971
Securities Held to Maturity, Fair Value	348,813	369,698
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	623,907	664,488
Securities Held to Maturity, Gross Unrealized Gains	169	1,252
Securities Held to Maturity, Gross Unrealized Losses	20,867	19,593
Securities Held to Maturity, Fair Value	603,209	646,147
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	573,057	654,262
Securities Held to Maturity, Gross Unrealized Losses	61,525	59,223
Securities Held to Maturity, Fair Value	511,532	595,039
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	818,604	920,048
Securities Held to Maturity, Gross Unrealized Losses	72,854	75,803
Securities Held to Maturity, Fair Value	745,750	844,245
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	25,406	32,491
Securities Held to Maturity, Gross Unrealized Losses	1,184	1,702
Securities Held to Maturity, Fair Value	$ 24,222	$ 30,789