Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	$ 2,132,882	$ 2,435,663
Securities Held to Maturity, Gross Unrealized Gains	956	169
Securities Held to Maturity, Gross Unrealized Losses	122,812	202,306
Securities Held to Maturity, Fair Value	2,011,026	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	373,605	394,689
Securities Held to Maturity, Gross Unrealized Gains	248	0
Securities Held to Maturity, Gross Unrealized Losses	30,143	45,876
Securities Held to Maturity, Fair Value	343,710	348,813
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	511,516	623,907
Securities Held to Maturity, Gross Unrealized Gains	708	169
Securities Held to Maturity, Gross Unrealized Losses	11,455	20,867
Securities Held to Maturity, Fair Value	500,769	603,209
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	497,338	573,057
Securities Held to Maturity, Gross Unrealized Losses	34,239	61,525
Securities Held to Maturity, Fair Value	463,099	511,532
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	731,329	818,604
Securities Held to Maturity, Gross Unrealized Losses	46,455	72,854
Securities Held to Maturity, Fair Value	684,874	745,750
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized Cost	19,094	25,406
Securities Held to Maturity, Gross Unrealized Losses	520	1,184
Securities Held to Maturity, Fair Value	$ 18,574	$ 24,222