Securities (Securities Available for Sale with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value	$ 52,894	$ 2,475,872
Available for sale, Losses less than 12 months, Gross unrealized losses	399	173,301
Available for sale, Losses 12 months or longer, Fair value	4,223,749	3,007,890
Available for sale, Losses 12 months or longer, Gross unrealized losses	592,694	583,187
Available for sale, Total, Fair value	4,276,643	5,483,762
Available for sale, Total, Gross unrealized losses	593,093	756,488
U.S. Treasury And Government Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value		102,607
Available for sale, Losses less than 12 months, Gross unrealized losses		754
Available for sale, Losses 12 months or longer, Fair value	7,790	8,258
Available for sale, Losses 12 months or longer, Gross unrealized losses	1,514	1,592
Available for sale, Total, Fair value	7,790	110,865
Available for sale, Total, Gross unrealized losses	1,514	2,346
Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value	49,832	192,334
Available for sale, Losses less than 12 months, Gross unrealized losses	374	3,981
Available for sale, Losses 12 months or longer, Fair value	128,965	0
Available for sale, Losses 12 months or longer, Gross unrealized losses	1,826	0
Available for sale, Total, Fair value	178,797	192,334
Available for sale, Total, Gross unrealized losses	2,200	3,981
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value	3,062	636,060
Available for sale, Losses less than 12 months, Gross unrealized losses	25	49,790
Available for sale, Losses 12 months or longer, Fair value	1,795,154	1,611,832
Available for sale, Losses 12 months or longer, Gross unrealized losses	329,254	348,829
Available for sale, Total, Fair value	1,798,216	2,247,892
Available for sale, Total, Gross unrealized losses	329,279	398,619
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value		1,489,974
Available for sale, Losses less than 12 months, Gross unrealized losses		114,195
Available for sale, Losses 12 months or longer, Fair value	2,227,703	1,351,530
Available for sale, Losses 12 months or longer, Gross unrealized losses	253,576	228,685
Available for sale, Total, Fair value	2,227,703	2,841,504
Available for sale, Total, Gross unrealized losses	253,576	342,880
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value		41,703
Available for sale, Losses less than 12 months, Gross unrealized losses		3,275
Available for sale, Losses 12 months or longer, Fair value	44,285	28,884
Available for sale, Losses 12 months or longer, Gross unrealized losses	3,376	2,967
Available for sale, Total, Fair value	44,285	70,587
Available for sale, Total, Gross unrealized losses	3,376	6,242
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair value		13,194
Available for sale, Losses less than 12 months, Gross unrealized losses		1,306
Available for sale, Losses 12 months or longer, Fair value	19,852	7,386
Available for sale, Losses 12 months or longer, Gross unrealized losses	3,148	1,114
Available for sale, Total, Fair value	19,852	20,580
Available for sale, Total, Gross unrealized losses	$ 3,148	$ 2,420

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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