Securities (Securities Available for Sale with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair Value	$ 2,475,872	$ 2,327,716
Available for sale, Losses less than 12 months, Gross Unrealized Losses	173,301	40,085
Available for sale, Losses 12 months or longer, Fair Value	3,007,890	1,573,943
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	583,187	67,562
Available for sale, Total, Fair Value	5,483,762	3,901,659
Available for sale, Total, Gross Unrealized Losses	756,488	107,647
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	198,318
Available for sale, Losses less than 12 months, Gross Unrealized Losses	754	2,305
Available for sale, Losses 12 months or longer, Fair Value	8,258	63,534
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	1,592	3,035
Available for sale, Total, Fair Value	110,865	261,852
Available for sale, Total, Gross Unrealized Losses	2,346	5,340
Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair Value	192,334	43,021
Available for sale, Losses less than 12 months, Gross Unrealized Losses	3,981	2,372
Available for sale, Losses 12 months or longer, Fair Value		25,126
Available for sale, Losses 12 months or longer, Gross Unrealized Losses		1,190
Available for sale, Total, Fair Value	192,334	68,147
Available for sale, Total, Gross Unrealized Losses	3,981	3,562
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Losses less than 12 months, Fair Value	636,060	1,293,179
Available for sale, Losses less than 12 months, Gross Unrealized Losses	49,790	20,581
Available for sale, Losses 12 months or longer, Fair Value	1,611,832	819,596
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	348,829	29,541
Available for sale, Total, Fair Value	2,247,892	2,112,775
Available for sale, Total, Gross Unrealized Losses	398,619	50,122
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	786,206
Available for sale, Losses less than 12 months, Gross Unrealized Losses	114,195	14,819
Available for sale, Losses 12 months or longer, Fair Value	1,351,530	665,687
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	228,685	33,796
Available for sale, Total, Fair Value	2,841,504	1,451,893
Available for sale, Total, Gross Unrealized Losses	342,880	48,615
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	28,884
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	2,967
Available for sale, Total, Fair Value	70,587
Available for sale, Total, Gross Unrealized Losses	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	6,992
Available for sale, Losses less than 12 months, Gross Unrealized Losses	1,306	8
Available for sale, Losses 12 months or longer, Fair Value	7,386
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	1,114
Available for sale, Total, Fair Value	20,580	6,992
Available for sale, Total, Gross Unrealized Losses	$ 2,420	$ 8

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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