Securities (Securities Held to Maturity with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value	$ 352,931	$ 1,836,592
Held to maturity, Losses less than 12 months, Gross unrealized losses	1,864	112,063
Held to maturity, Losses 12 months or longer, Fair value	2,035,771	725,298
Held to maturity, Losses 12 months or longer, Gross unrealized losses	198,428	125,808
Held to maturity, Total, Fair value	2,388,702	2,561,890
Held to maturity, Total, Gross unrealized losses	200,292	237,871
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	9,530	145,893
Held to maturity, Losses less than 12 months, Gross unrealized losses	63	13,245
Held to maturity, Losses 12 months or longer, Fair value	339,533	226,499
Held to maturity, Losses 12 months or longer, Gross unrealized losses	43,908	35,799
Held to maturity, Total, Fair value	349,063	372,392
Held to maturity, Total, Gross unrealized losses	43,971	49,044
Municipal Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value	343,401	560,288
Held to maturity, Losses less than 12 months, Gross unrealized losses	1,801	8,878
Held to maturity, Losses 12 months or longer, Fair value	226,165	64,346
Held to maturity, Losses 12 months or longer, Gross unrealized losses	17,792	17,680
Held to maturity, Total, Fair value	569,566	624,634
Held to maturity, Total, Gross unrealized losses	19,593	26,558
Residential Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value		391,146
Held to maturity, Losses less than 12 months, Gross unrealized losses		30,515
Held to maturity, Losses 12 months or longer, Fair value	595,039	270,800
Held to maturity, Losses 12 months or longer, Gross unrealized losses	59,223	42,017
Held to maturity, Total, Fair value	595,039	661,946
Held to maturity, Total, Gross unrealized losses	59,223	72,532
Commercial Mortgage-Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value		697,827
Held to maturity, Losses less than 12 months, Gross unrealized losses		56,899
Held to maturity, Losses 12 months or longer, Fair value	844,245	163,653
Held to maturity, Losses 12 months or longer, Gross unrealized losses	75,803	30,312
Held to maturity, Total, Fair value	844,245	861,480
Held to maturity, Total, Gross unrealized losses	75,803	87,211
Collateralized Mortgage Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held to maturity, Losses less than 12 months, Fair value		41,438
Held to maturity, Losses less than 12 months, Gross unrealized losses		2,526
Held to maturity, Losses 12 months or longer, Fair value	30,789
Held to maturity, Losses 12 months or longer, Gross unrealized losses	1,702
Held to maturity, Total, Fair value	30,789	41,438
Held to maturity, Total, Gross unrealized losses	$ 1,702	$ 2,526