Subsequent Events (Details)		1 Months Ended				2 Months Ended	6 Months Ended
	Jul. 29, 2022 USD ($) item property shares	Sep. 30, 2022 USD ($) property $ / shares	Aug. 31, 2022 USD ($) property $ / shares	Jul. 31, 2022 USD ($)	Jul. 29, 2022 USD ($) item property $ / shares	Sep. 30, 2022 USD ($) property	Jun. 30, 2022 USD ($) item property shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Real Estate Investments
Number of Units in Real Estate Property | item							217
Deferred rent							$ 22,689,000		$ 24,146,000
Debt:
Amount borrowed							99,000,000	$ 17,000,000
Repayment paid							153,900,000	41,000,000
Term loans, net of debt issue cost							734,868,000		722,719,000
Available for borrowing							344,000,000		289,100,000
Unsecured revolving line of credit							56,000,000		110,900,000
Equity
Proceeds from common stock issued							$ 34,203,000
Common Stock | Equity Distribution Agreements
Equity
Shares common stock sold | shares							909,800
Proceeds from common stock issued							$ 34,203,000
Revolving line of credit
Debt:
Amount borrowed							99,000,000	17,000,000
Repayment paid							153,900,000	$ 41,000,000
Term loans, net of debt issue cost							56,000,000		110,900,000
Available for borrowing							344,000,000		289,100,000
Senior Unsecured Notes
Debt:
Term loans, net of debt issue cost							$ 579,431,000		$ 512,456,000
ALF
Real Estate Investments
Number of properties | property							4
Number of Units in Real Estate Property | item							74
Subsequent Event | Dividend Payable, July 29, 2022
Equity
Dividends declared and paid per common share | $ / shares					$ 0.19
Subsequent Event | Dividend Payable, August 31, 2022
Equity
Dividends declared and paid per common share | $ / shares			$ 0.19
Subsequent Event | Dividend Payable, September 30, 2022
Equity
Dividends declared and paid per common share | $ / shares		$ 0.19
Subsequent Event | Equity Distribution Agreements
Equity
Shares common stock sold | shares	125,200
Proceeds from common stock issued	$ 4,754,000
Amount available under effective shelf registration statement	$ 160,349,000				$ 160,349,000
Subsequent Event | Common Stock | Dividend Payable, July 29, 2022
Equity
Dividends declared and paid per common share | $ / shares					$ 0.19
Subsequent Event | Common Stock | Dividend Payable, August 31, 2022
Equity
Dividends declared and paid per common share | $ / shares			$ 0.19
Subsequent Event | Common Stock | Dividend Payable, September 30, 2022
Equity
Dividends declared and paid per common share | $ / shares		$ 0.19
Subsequent Event | Common Stock | Equity Distribution Agreements
Equity
Shares common stock sold | shares	125,200
Subsequent Event | Revolving line of credit
Debt:
Amount borrowed	$ 20,500,000
Term loans, net of debt issue cost	76,500,000				$ 76,500,000
Available for borrowing	323,500,000				323,500,000
Subsequent Event | Senior Unsecured Notes
Debt:
Repayment paid	20,160,000
Term loans, net of debt issue cost	$ 559,271,000				$ 559,271,000
Subsequent Event | ALF
Real Estate Investments
Number of properties | property	12				12
Number of Units in Real Estate Property | item	625				625
Deferred rent receivable forgiven	$ 7,066,000
Lease termination fee	$ 500,000
Master lease agreement term in a lessor operating lease	2 years
Initial term of lessor operating lease with zero rent	4 months
Lease incentive payment	$ 410,000
Deferred rent		$ 150,000				$ 150,000
Monthly contractual rent		445,000				$ 445,000
Number of properties rent deferred | property						8
Rent abated				$ 240,000
Rent abatements agreed		$ 240,000	$ 240,000			$ 240,000
Number of property rent abatement agreed | property		2	2