Securities (Amortized Cost and Fair Value of Debt Securities Held to Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized cost	$ 2,570,622	$ 2,684,779
Securities Held to Maturity, Gross unrealized gains	388	1,431
Securities Held to Maturity, Gross unrealized losses	223,053	200,292
Securities Held to Maturity, Fair value	2,347,957	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	404,468	413,490
Securities Held to Maturity, Gross unrealized gains	19	179
Securities Held to Maturity, Gross unrealized losses	48,562	43,971
Securities Held to Maturity, Fair value	355,925	369,698
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized cost	630,812	664,488
Securities Held to Maturity, Gross unrealized gains	369	1,252
Securities Held to Maturity, Gross unrealized losses	25,348	19,593
Securities Held to Maturity, Fair value	605,833	646,147
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized cost	614,200	654,262
Securities Held to Maturity, Gross unrealized losses	65,661	59,223
Securities Held to Maturity, Fair value	548,539	595,039
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized cost	892,436	920,048
Securities Held to Maturity, Gross unrealized losses	81,803	75,803
Securities Held to Maturity, Fair value	810,633	844,245
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities Held to Maturity, Gross Amortized cost	28,706	32,491
Securities Held to Maturity, Gross unrealized losses	1,679	1,702
Securities Held to Maturity, Fair value	$ 27,027	$ 30,789