Securities (Securities Held to Maturity with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value	$ 62,828	$ 352,931
Held to maturity, Losses less than 12 months, Gross unrealized losses	719	1,864
Held to maturity, Losses 12 months or longer, Fair value	2,253,575	2,035,771
Held to maturity, Losses 12 months or longer, Gross unrealized losses	222,334	198,428
Held to maturity, Total, Fair value	2,316,403	2,388,702
Held to maturity, Total, Gross unrealized losses	223,053	200,292
U.S. Treasury And Government Agency Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value	10,408	9,530
Held to maturity, Losses less than 12 months, Gross unrealized losses	136	63
Held to maturity, Losses 12 months or longer, Fair value	336,035	339,533
Held to maturity, Losses 12 months or longer, Gross unrealized losses	48,426	43,908
Held to maturity, Total, Fair value	346,443	349,063
Held to maturity, Total, Gross unrealized losses	48,562	43,971
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value	52,420	343,401
Held to maturity, Losses less than 12 months, Gross unrealized losses	583	1,801
Held to maturity, Losses 12 months or longer, Fair value	531,341	226,165
Held to maturity, Losses 12 months or longer, Gross unrealized losses	24,765	17,792
Held to maturity, Total, Fair value	583,761	569,566
Held to maturity, Total, Gross unrealized losses	25,348	19,593
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses 12 months or longer, Fair value	548,539	595,039
Held to maturity, Losses 12 months or longer, Gross unrealized losses	65,661	59,223
Held to maturity, Total, Fair value	548,539	595,039
Held to maturity, Total, Gross unrealized losses	65,661	59,223
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses 12 months or longer, Fair value	810,633	844,245
Held to maturity, Losses 12 months or longer, Gross unrealized losses	81,803	75,803
Held to maturity, Total, Fair value	810,633	844,245
Held to maturity, Total, Gross unrealized losses	81,803	75,803
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses 12 months or longer, Fair value	27,027	30,789
Held to maturity, Losses 12 months or longer, Gross unrealized losses	1,679	1,702
Held to maturity, Total, Fair value	27,027	30,789
Held to maturity, Total, Gross unrealized losses	$ 1,679	$ 1,702