Securities (Securities Available for Sale with Unrealized Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value	$ 686,908	$ 52,894
Available for sale, Losses less than 12 months, Gross Unrealized Losses	8,163	399
Available for sale, Losses 12 months or longer, Fair Value	3,921,412	4,223,749
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	607,509	592,694
Available for sale, Total, Fair Value	4,608,320	4,276,643
Available for sale, Total, Gross Unrealized Losses	615,672	593,093
U.S. Treasury And Government Agency Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value	130,453	0
Available for sale, Losses less than 12 months, Gross Unrealized Losses	2,243	0
Available for sale, Losses 12 months or longer, Fair Value	7,247	7,790
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	1,651	1,514
Available for sale, Total, Fair Value	137,700	7,790
Available for sale, Total, Gross Unrealized Losses	3,894	1,514
Municipal Obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value	24,149	49,832
Available for sale, Losses less than 12 months, Gross Unrealized Losses	247	374
Available for sale, Losses 12 months or longer, Fair Value	170,110	128,965
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	3,695	1,826
Available for sale, Total, Fair Value	194,259	178,797
Available for sale, Total, Gross Unrealized Losses	3,942	2,200
Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value	347,772	3,062
Available for sale, Losses less than 12 months, Gross Unrealized Losses	2,935	25
Available for sale, Losses 12 months or longer, Fair Value	1,554,001	1,795,154
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	350,619	329,254
Available for sale, Total, Fair Value	1,901,773	1,798,216
Available for sale, Total, Gross Unrealized Losses	353,554	329,279
Commercial Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value	184,534	0
Available for sale, Losses less than 12 months, Gross Unrealized Losses	2,738	0
Available for sale, Losses 12 months or longer, Fair Value	2,139,191	2,227,703
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	247,854	253,576
Available for sale, Total, Fair Value	2,323,725	2,227,703
Available for sale, Total, Gross Unrealized Losses	250,592	253,576
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value		0
Available for sale, Losses less than 12 months, Gross Unrealized Losses		0
Available for sale, Losses 12 months or longer, Fair Value	35,247	44,285
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	2,306	3,376
Available for sale, Total, Fair Value	35,247	44,285
Available for sale, Total, Gross Unrealized Losses	2,306	3,376
Corporate Debt Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Available for sale, Losses less than 12 months, Fair Value		0
Available for sale, Losses less than 12 months, Gross Unrealized Losses		0
Available for sale, Losses 12 months or longer, Fair Value	15,616	19,852
Available for sale, Losses 12 months or longer, Gross Unrealized Losses	1,384	3,148
Available for sale, Total, Fair Value	15,616	19,852
Available for sale, Total, Gross Unrealized Losses	$ 1,384	$ 3,148

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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