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Investments - Available-for-sale Securities in Unrealized Loss Positions (Details)
$ in Thousands
Sep. 30, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 250 134
Debt securities, greater than 12 months, number of issues | security 92 10
Debt securities, number of issues | security 342 144
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 54,927 $ 95,923
Debt securities, greater than 12 months, fair value 56,519 7,801
Debt securities, fair value 111,446 103,724
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (7,256) (1,750)
Debt securities, greater than 12 months, unrealized losses (10,269) (97)
Debt securities, total unrealized losses $ (17,525) $ (1,847)
U.S. Government    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 9 6
Debt securities, greater than 12 months, number of issues | security 4 1
Debt securities, number of issues | security 13 7
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 3,746 $ 10,323
Debt securities, greater than 12 months, fair value 3,717 4,728
Debt securities, fair value 7,463 15,051
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (161) (47)
Debt securities, greater than 12 months, unrealized losses (206) (30)
Debt securities, total unrealized losses $ (367) $ (77)
State and local government    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 93 41
Debt securities, greater than 12 months, number of issues | security 32 4
Debt securities, number of issues | security 125 45
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 16,323 $ 8,875
Debt securities, greater than 12 months, fair value 4,518 446
Debt securities, fair value 20,841 9,321
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (3,165) (172)
Debt securities, greater than 12 months, unrealized losses (1,351) (17)
Debt securities, total unrealized losses $ (4,516) $ (189)
Corporate debt    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 42 41
Debt securities, greater than 12 months, number of issues | security 28 1
Debt securities, number of issues | security 70 42
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 16,035 $ 22,748
Debt securities, greater than 12 months, fair value 14,111 705
Debt securities, fair value 30,146 23,453
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (2,568) (505)
Debt securities, greater than 12 months, unrealized losses (2,830) (45)
Debt securities, total unrealized losses $ (5,398) $ (550)
Asset-backed securities    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 16 24
Debt securities, greater than 12 months, number of issues | security 12 2
Debt securities, number of issues | security 28 26
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 8,267 $ 24,305
Debt securities, greater than 12 months, fair value 13,456 1,893
Debt securities, fair value 21,723 26,198
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (162) (219)
Debt securities, greater than 12 months, unrealized losses (1,011) (5)
Debt securities, total unrealized losses $ (1,173) $ (224)
Mortgage-backed securities    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 60 12
Debt securities, greater than 12 months, number of issues | security 9 0
Debt securities, number of issues | security 69 12
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 4,947 $ 27,034
Debt securities, greater than 12 months, fair value 19,347 0
Debt securities, fair value 24,294 27,034
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (780) (762)
Debt securities, greater than 12 months, unrealized losses (4,662) 0
Debt securities, total unrealized losses $ (5,442) $ (762)
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 4 0
Debt securities, greater than 12 months, number of issues | security 0 0
Debt securities, number of issues | security 4 0
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 3,212 $ 0
Debt securities, greater than 12 months, fair value 0 0
Debt securities, fair value 3,212 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (181) 0
Debt securities, greater than 12 months, unrealized losses 0 0
Debt securities, total unrealized losses $ (181) $ 0
Collateralized mortgage obligations    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]    
Debt securities, less than 12 months, number of issues | security 26 10
Debt securities, greater than 12 months, number of issues | security 7 2
Debt securities, number of issues | security 33 12
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 2,397 $ 2,638
Debt securities, greater than 12 months, fair value 1,370 29
Debt securities, fair value 3,767 2,667
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (239) (45)
Debt securities, greater than 12 months, unrealized losses (209) 0
Debt securities, total unrealized losses $ (448) $ (45)