Investments - Loans and Financing Receivables (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($)	Jan. 01, 2020 USD ($)
Loans and direct financing receivables
Number of mortgage loans | loan		23
Total principal payments	$ 337,239	$ 337,239
Unamortized loan origination costs	963	963	$ 1,046
Sale-leaseback transactions accounted for as financing arrangements	316,200	316,200	255,500
Direct financing receivables	61,063	61,063	78,637
Allowance for credit and loan losses	(5,259)	(5,259)	(9,208)
Total loans and direct financing receivables	710,186	710,186	697,269
Credit loss reserves recognized			$ 3,900	$ 2,500
Write-offs charged against allowance	3,700	3,700
ASU 2016-13
Loans and direct financing receivables
Write-offs charged against allowance		$ 3,700
Credit loss reserve					$ 2,500
Mortgage loans receivable with maturity range 2022 to 2026
Loans and direct financing receivables
Number of mortgage loans | loan		6	6
Mortgage loans receivable with maturity range 2032 to 2036
Loans and direct financing receivables
Number of mortgage loans | loan		3	3
Mortgage loans receivable with maturity range 2051 to 2060
Loans and direct financing receivables
Number of mortgage loans | loan		14	14
Number of mortgage loans allowing for prepayment in whole | loan		4
Mortgage loans receivable with maturity range 2051 to 2060 | Minimum
Loans and direct financing receivables
Prepayment penalties (as a percent)		20.00%
Mortgage loans receivable with maturity range 2051 to 2060 | Maximum
Loans and direct financing receivables
Prepayment penalties (as a percent)		70.00%
Loans receivable
Loans and direct financing receivables
Total principal payments	337,239	$ 337,239	$ 371,311
Mortgage Loans Receivable [Member]
Loans and direct financing receivables
Mortgage loans receivable	318,853	$ 318,853	345,902
Mortgage Loans Receivable [Member] | Mortgage loans receivable with maturity range 2022 to 2026
Loans and direct financing receivables
Stated Interest Rate (as a percent)		7.98%
Mortgage loans receivable	114,171	$ 114,171	114,911
Mortgage Loans Receivable [Member] | Mortgage loans receivable with maturity range 2032 to 2036
Loans and direct financing receivables
Stated Interest Rate (as a percent)		8.83%
Mortgage loans receivable	11,674	$ 11,674	14,444
Mortgage Loans Receivable [Member] | Mortgage loans receivable with maturity range 2051 to 2060
Loans and direct financing receivables
Stated Interest Rate (as a percent)		8.51%
Mortgage loans receivable	193,008	$ 193,008	216,547
Equipment And Other Loans Receivable [Member] | Equipment and other loans receivable maturity range 2022 to 2029
Loans and direct financing receivables
Equipment and other loans receivable	18,386	$ 18,386	25,409
Interest rate of equipment and other loans		7.34
Sale Leaseback Financing Arrangements [Member] | Sale-leaseback transactions accounted for financing arrangements with maturities ranging from 2034 - 2043
Loans and direct financing receivables
Stated Interest Rate (as a percent)		7.51%
Sale-leaseback transactions accounted for as financing arrangements	316,180	$ 316,180	255,483
Direct Financing Receivables [Member]
Loans and direct financing receivables
Direct financing receivables	$ 61,063	$ 61,063	$ 78,637