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Investments - Available-for-sale Securities in Unrealized Loss Positions (Details)
$ in Thousands
Jun. 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 265 134
Debt securities, greater than 12 months, number of issues | security 49 10
Debt securities, number of issues | security 314 144
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 67,991 $ 95,923
Debt securities, greater than 12 months, fair value 47,482 7,801
Debt securities, fair value 115,473 103,724
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (7,191) (1,750)
Debt securities, greater than 12 months, unrealized losses (6,057) (97)
Debt securities, total unrealized losses $ (13,248) $ (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 $ 3,818 $ 10,323
Debt securities, greater than 12 months, fair value 3,756 4,728
Debt securities, fair value 7,574 15,051
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (91) (47)
Debt securities, greater than 12 months, unrealized losses (168) (30)
Debt securities, total unrealized losses $ (259) $ (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 108 41
Debt securities, greater than 12 months, number of issues | security 8 4
Debt securities, number of issues | security 116 45
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 19,316 $ 8,875
Debt securities, greater than 12 months, fair value 800 446
Debt securities, fair value 20,116 9,321
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (3,194) (172)
Debt securities, greater than 12 months, unrealized losses (188) (17)
Debt securities, total unrealized losses $ (3,382) $ (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 55 41
Debt securities, greater than 12 months, number of issues | security 13 1
Debt securities, number of issues | security 68 42
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 23,297 $ 22,748
Debt securities, greater than 12 months, fair value 7,837 705
Debt securities, fair value 31,134 23,453
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (2,797) (505)
Debt securities, greater than 12 months, unrealized losses (1,289) (45)
Debt securities, total unrealized losses $ (4,086) $ (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 18 24
Debt securities, greater than 12 months, number of issues | security 12 2
Debt securities, number of issues | security 30 26
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 9,225 $ 24,305
Debt securities, greater than 12 months, fair value 13,620 1,893
Debt securities, fair value 22,845 26,198
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (158) (219)
Debt securities, greater than 12 months, unrealized losses (882) (5)
Debt securities, total unrealized losses $ (1,040) $ (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 45 12
Debt securities, greater than 12 months, number of issues | security 7 0
Debt securities, number of issues | security 52 12
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 6,227 $ 27,034
Debt securities, greater than 12 months, fair value 20,338 0
Debt securities, fair value 26,565 27,034
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (612) (762)
Debt securities, greater than 12 months, unrealized losses (3,409) 0
Debt securities, total unrealized losses $ (4,021) $ (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 $ 3,243 $ 0
Debt securities, greater than 12 months, fair value 0 0
Debt securities, fair value 3,243 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (152) 0
Debt securities, greater than 12 months, unrealized losses 0 0
Debt securities, total unrealized losses $ (152) $ 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 5 2
Debt securities, number of issues | security 31 12
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]    
Debt securities, less than 12 months, fair value $ 2,865 $ 2,638
Debt securities, greater than 12 months, fair value 1,131 29
Debt securities, fair value 3,996 2,667
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Debt securities, less than 12 months, unrealized losses (187) (45)
Debt securities, greater than 12 months, unrealized losses (121) 0
Debt securities, total unrealized losses $ (308) $ (45)