Investments - Additional Information (Details)	6 Months Ended	12 Months Ended
Jun. 30, 2022 USD ($) Loan Investment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) Loan
Schedule Of Investments [Line Items]
Commitments to investment in available for sale securities	$ 529,000		$ 657,000
Number of investment instruments \| Investment	36
Number of mortgage loan \| Loan	322
Average loan balance	$ 148,000
Maximum exposure related to a single loan	555,000
New mortgage loans purchased	$ 2,828,000	$ 465,000
Number of mortgage loans in restructured status \| Loan	3		2
Total carrying value of mortgage loans in restructured status	$ 812,000		$ 685,000
Impairments for mortgage loans	0		0
Mortgage loans, nonaccrual status	0		0
Commitments to investment in mortgage loans	2,980,000		4,485,000
Gross unrealized losses	$ 24,105,000		$ 1,234,000
Minimum
Schedule Of Investments [Line Items]
Commercial mortgage loan ownership percent	0.60%
Maximum
Schedule Of Investments [Line Items]
Commercial mortgage loan ownership percent	30.00%
Mortgage Loans Receivable \| Credit Concentration Risk
Schedule Of Investments [Line Items]
Fixed maturities portfolio	100.00%		100.00%
Mortgage Loans Receivable \| Credit Concentration Risk \| Investment Grade Securities
Schedule Of Investments [Line Items]
Fixed maturities portfolio	94.40%		94.80%
Fixed Maturities
Schedule Of Investments [Line Items]
Deposit with governmental authorities	$ 2,954,000		$ 3,604,000

Carrying amount of cash and investment securities on deposit with state regulatory authorities in connection with capital requirements.

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