Securities Securities - Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,456,921	$ 1,946,549
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	77,421	21,578
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,550,911	317,275
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	248,005	11,808
Debt Securities, Available-for-sale, Unrealized Loss Position	3,007,832	2,263,824
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	325,426	33,386
US Treasury Securities
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	192,188	178,610
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,963	881
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,997	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	4	0
Debt Securities, Available-for-sale, Unrealized Loss Position	194,185	178,610
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	1,967	881
U.S. Government Agency Securities
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	46,062	365,833
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,224	3,024
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	350,094	54,266
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	34,094	1,974
Debt Securities, Available-for-sale, Unrealized Loss Position	396,156	420,099
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	36,318	4,998
Mortgage-backed Agency Securities
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	390,014	825,664
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	34,106	11,859
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	570,601	178,956
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	109,477	6,647
Debt Securities, Available-for-sale, Unrealized Loss Position	960,615	1,004,620
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	143,583	18,506
State and Municipal Securities
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	568,691	363,102
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	18,863	2,665
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	304,451	57,270
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	59,694	1,045
Debt Securities, Available-for-sale, Unrealized Loss Position	873,142	420,372
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	78,557	3,710
Asset-backed Securities
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	513	198,349
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	5	2,595
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	116,442	6,513
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	16,978	190
Debt Securities, Available-for-sale, Unrealized Loss Position	116,955	204,862
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	16,983	2,785
Corporate Notes
Investment securities, continuous unrealized loss position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	259,453	14,991
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	20,260	554
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	207,326	20,270
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	27,758	1,952
Debt Securities, Available-for-sale, Unrealized Loss Position	466,779	35,261
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 48,018	$ 2,506

Investment Securities, Continuous Unrealized Loss Position both available-for-sale and held-to-maturity.

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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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Amount of accumulated unrealized loss on 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 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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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 less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on 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 less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer.

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