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Investments - Schedule of Available-for-sale Securities in Continuous Unrealized Loss Position (Details) $ in Thousands | Sep. 30, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 283,255 | $ 344,073
Less than or equal to one year, gross unrealized losses | $ (21,863) | $ (4,403)
Less than or equal to one year, number of securities | security | 852 | 762
More than one year, fair value | $ 242,295 | $ 25,110
More than one year, gross unrealized loss | $ (41,322) | $ (2,707)
More than one year, number of securities | security | 730 | 102
U.S. Treasury securities and obligations of U.S. government authorities and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 167,192 | $ 216,378
Less than or equal to one year, gross unrealized losses | $ (14,219) | $ (2,827)
Less than or equal to one year, number of securities | security | 407 | 324
More than one year, fair value | $ 134,796 | $ 11,920
More than one year, gross unrealized loss | $ (23,589) | $ (370)
More than one year, number of securities | security | 307 | 47
Obligations of state and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 36,638 | $ 17,190
Less than or equal to one year, gross unrealized losses | $ (2,908) | $ (275)
Less than or equal to one year, number of securities | security | 123 | 64
More than one year, fair value | $ 12,508 | $ 1,152
More than one year, gross unrealized loss | $ (2,266) | $ (38)
More than one year, number of securities | security | 56 | 5
Corporate securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 69,448 | $ 99,434
Less than or equal to one year, gross unrealized losses | $ (4,258) | $ (1,159)
Less than or equal to one year, number of securities | security | 267 | 326
More than one year, fair value | $ 86,417 | $ 9,722
More than one year, gross unrealized loss | $ (11,433) | $ (237)
More than one year, number of securities | security | 326 | 45
Asset backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 9,670 | $ 7,454
Less than or equal to one year, gross unrealized losses | $ (477) | $ (84)
Less than or equal to one year, number of securities | security | 54 | 38
More than one year, fair value | $ 6,532 | $ 2,316
More than one year, gross unrealized loss | $ (3,751) | $ (2,062)
More than one year, number of securities | security | 33 | 5
Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 0 | $ 1,339
Less than or equal to one year, gross unrealized losses | $ 0 | $ 0
Less than or equal to one year, number of securities | security | 0 | 2
More than one year, fair value | $ 0 | $ 0
More than one year, gross unrealized loss | $ 0 | $ 0
More than one year, number of securities | security | 0 | 0
Obligations of foreign governments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than or equal to one year, fair value | $ 307 | $ 2,278
Less than or equal to one year, gross unrealized losses | $ (1) | $ (58)
Less than or equal to one year, number of securities | security | 1 | 8
More than one year, fair value | $ 2,042 | $ 0
More than one year, gross unrealized loss | $ (283) | $ 0
More than one year, number of securities | security | 8 | 0

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