Quarterly report pursuant to Section 13 or 15(d)

Investments - Securities with Gross Unrealized Loss Position (Details)

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Investments - Securities with Gross Unrealized Loss Position (Details)
$ in Thousands
Sep. 30, 2021
USD ($)
security
item
Net Investment Income [Line Items]  
Number of securities in an unrealized loss position | security 260
Unrealized loss position for 12 months or longer | item 0
Debt Securities  
Net Investment Income [Line Items]  
Less Than Twelve Months, Gross Unrealized Loss $ (155)
Less Than Twelve Months, Fair Value 31,883
Total, Gross Unrealized Loss (155)
Total, Fair Value 31,883
U.S. government obligations  
Net Investment Income [Line Items]  
Less Than Twelve Months, Gross Unrealized Loss (27)
Less Than Twelve Months, Fair Value 6,073
Total, Gross Unrealized Loss (27)
Total, Fair Value 6,073
Obligations of states, municipalities and political subdivisions  
Net Investment Income [Line Items]  
Less Than Twelve Months, Gross Unrealized Loss (12)
Less Than Twelve Months, Fair Value 1,274
Total, Gross Unrealized Loss (12)
Total, Fair Value 1,274
Industrial and miscellaneous  
Net Investment Income [Line Items]  
Less Than Twelve Months, Gross Unrealized Loss (48)
Less Than Twelve Months, Fair Value 11,978
Total, Gross Unrealized Loss (48)
Total, Fair Value 11,978
Residential and commercial mortgage-backed securities  
Net Investment Income [Line Items]  
Less Than Twelve Months, Gross Unrealized Loss (55)
Less Than Twelve Months, Fair Value 9,108
Total, Gross Unrealized Loss (55)
Total, Fair Value 9,108
Other loan-backed and structured securities  
Net Investment Income [Line Items]  
Less Than Twelve Months, Gross Unrealized Loss (13)
Less Than Twelve Months, Fair Value 3,450
Total, Gross Unrealized Loss (13)
Total, Fair Value $ 3,450