Investments - Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 722,676	$ 725,830
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	45,806	7,842
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	756,002	13,117
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	147,922	359
Debt Securities, Available-for-sale, Unrealized Loss Position	1,478,678	738,947
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	193,728	8,201
Obligations of U.S. Government-sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	73,738	163,634
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	6,249	1,775
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	163,047	4,874
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	22,056	126
Debt Securities, Available-for-sale, Unrealized Loss Position	236,785	168,508
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	28,305	1,901
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	103,179	242,188
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	13,501	2,361
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	311,634	1,776
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	76,924	49
Debt Securities, Available-for-sale, Unrealized Loss Position	414,813	243,964
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	90,425	2,410
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	334,431	259,047
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	20,038	3,685
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	281,321	6,467
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	48,942	184
Debt Securities, Available-for-sale, Unrealized Loss Position	615,752	265,514
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	68,980	3,869
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	198,688	60,961
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4,908	21
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	198,688	60,961
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	4,908	$ 21
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	12,640
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,110
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-sale, Unrealized Loss Position	12,640
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,110

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 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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