Subsequent Events (Details) - Five Star		1 Months Ended	3 Months Ended
	Apr. 01, 2019 USD ($)	Apr. 30, 2019 USD ($) living_unit lease_agreement renewal_option community	May 09, 2019 USD ($)	Apr. 30, 2019 USD ($) living_unit community	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Subsequent Event [Line Items]
Amounts of transaction					$ 39,313,000	$ 51,759,000
Subsequent Event
Subsequent Event [Line Items]
Percentage of common shares to be issued		34.00%		34.00%
Percent of shares issued and outstanding		51.00%		51.00%
Amounts of transaction		$ 75,000,000
Monthly minimum rent payable			$ 11,000,000	$ 0
Period within conversion time		6 months
Annual incentive fee estimate included in management fees		$ 0.15
Percentage of gross revenues realized at all communities		1.50%		1.50%
Aggregate period of new management fee term		15 years
Number of consecutive renewal terms of agreement | renewal_option		2
Period of new management fee term		5 years
Percentage target EBITDA of new management agreement not earned		90.00%
Period of consecutive calender year of target EBITDA		2 years
Aggregate period of consecutive calender year of target EBITDA		3 years
Percentage of combined revenues in new management agreement		20.00%
Senior Living Communities | Subsequent Event
Subsequent Event [Line Items]
Number of existing master leases | lease_agreement		5
Amounts of transaction	$ 50,000,000
Management fees as percentage of gross revenues		5.00%		5.00%
Oregon | Senior Living Communities | Subsequent Event
Subsequent Event [Line Items]
Number of units | living_unit		318		318
Maximum | Senior Living Communities | Subsequent Event
Subsequent Event [Line Items]
Adjustment amount not to be exceeded	$ 60,000,000
Line of Credit | Senior Living Communities | Subsequent Event
Subsequent Event [Line Items]
Line of credit		$ 25,000,000		$ 25,000,000
Number of real estate properties | community		6		6
Interest rate (as a percent)		6.00%		6.00%