Fair Values of Assets and Liabilities - Recurring Measurements (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) security	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 36,548		$ 26,417
Total equity investments	5,937		13,033
Total debt investments	7,668		10,375
Total investments	13,605		23,408
Total	50,153		49,825
Restricted cash equivalents	19,766		23,546
Cash	62,344		64,116
Restricted cash	2,542		2,406
Gross proceeds from sale of equity securities	6,804	$ 741
Gross realized gains recorded on sale of equity securities	1,646	175
Gross realized losses recorded on sale of equity securities	114	0
Amortized cost of available for sale debt securities	8,438		10,079
Unrealized losses on available for sale debt securities	770		10
Unrealized gains on available for sale debt securities	$ 2		296
Debt investments fair value less than 12 months \| security	87
Debt Securities unrealized loss position, less than 12 months	$ 6,925
Debt investments fair value greater than 12 months \| security	1
Debt Securities unrealized loss position, greater than 12 months	$ 45
Gross proceeds from sale of available for sale debt securities	1,020	1,294
Gross realized losses recorded on sale of debt securities	(5)	0
Gross realized gains recorded on sale of debt securities	1	$ 18
Restricted debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total debt investments	6,055		6,907
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	36,548		26,417
Total equity investments	5,937		6,980
Total debt investments	3,192		4,612
Total investments	9,129		11,592
Total	45,677		38,009
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0		0
Total equity investments	0		6,053
Total debt investments	4,476		5,763
Total investments	4,476		11,816
Total	4,476		11,816
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0		0
Total equity investments	0		0
Total debt investments	0		0
Total investments	0		0
Total	$ 0		$ 0

AlerisLife Inc. 10-Q