Securities (Securities Held to Maturity with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Held to Maturity, Losses less than 12 months, Fair Value	$ 109,688	$ 352,931
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses	1,291	1,864
Held to Maturity, Losses 12 months or longer, Fair Value	2,100,656	2,035,771
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses	201,015	198,428
Held To Maturity Securities Unrealized Loss Position Fair Value, Total	2,210,344	2,388,702
Held to Maturity, Total, Gross Unrealized Losses	202,306	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	27,660	9,530
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses	840	63
Held to Maturity, Losses 12 months or longer, Fair Value	321,154	339,533
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses	45,036	43,908
Held To Maturity Securities Unrealized Loss Position Fair Value, Total	348,814	349,063
Held to Maturity, Total, Gross Unrealized Losses	45,876	43,971
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to Maturity, Losses less than 12 months, Fair Value	82,028	343,401
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses	451	1,801
Held to Maturity, Losses 12 months or longer, Fair Value	497,999	226,165
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses	20,416	17,792
Held To Maturity Securities Unrealized Loss Position Fair Value, Total	580,027	569,566
Held to Maturity, Total, Gross Unrealized Losses	20,867	19,593
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to Maturity, Losses less than 12 months, Fair Value		0
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses		0
Held to Maturity, Losses 12 months or longer, Fair Value	511,531	595,039
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses	61,525	59,223
Held To Maturity Securities Unrealized Loss Position Fair Value, Total	511,531	595,039
Held to Maturity, Total, Gross Unrealized Losses	61,525	59,223
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to Maturity, Losses less than 12 months, Fair Value		0
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses		0
Held to Maturity, Losses 12 months or longer, Fair Value	745,750	844,245
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses	72,854	75,803
Held To Maturity Securities Unrealized Loss Position Fair Value, Total	745,750	844,245
Held to Maturity, Total, Gross Unrealized Losses	72,854	75,803
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to Maturity, Losses less than 12 months, Fair Value		0
Held to Maturity, Losses less than 12 months, Gross Unrealized Losses		0
Held to Maturity, Losses 12 months or longer, Fair Value	24,222	30,789
Held to Maturity, Losses 12 months or longer, Gross Unrealized Losses	1,184	1,702
Held To Maturity Securities Unrealized Loss Position Fair Value, Total	24,222	30,789
Held to Maturity, Total, Gross Unrealized Losses	$ 1,184	$ 1,702