Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	$ 2,231,335	$ 2,435,663
Securities Held to Maturity, Gross Unrealized Gains	329	169
Securities Held to Maturity, Gross Unrealized Losses	148,592	202,306
Securities Held to Maturity, Fair Value	2,083,072	2,233,526
U.S. Treasury And Government Agency Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	383,892	394,689
Securities Held to Maturity, Gross Unrealized Gains	160
Securities Held to Maturity, Gross Unrealized Losses	34,943	45,876
Securities Held to Maturity, Fair Value	349,109	348,813
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	549,495	623,907
Securities Held to Maturity, Gross Unrealized Gains	169	169
Securities Held to Maturity, Gross Unrealized Losses	15,089	20,867
Securities Held to Maturity, Fair Value	534,575	603,209
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	534,652	573,057
Securities Held to Maturity, Gross Unrealized Losses	42,703	61,525
Securities Held to Maturity, Fair Value	491,949	511,532
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	741,086	818,604
Securities Held to Maturity, Gross Unrealized Losses	55,032	72,854
Securities Held to Maturity, Fair Value	686,054	745,750
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	22,210	25,406
Securities Held to Maturity, Gross Unrealized Losses	825	1,184
Securities Held to Maturity, Fair Value	$ 21,385	$ 24,222