Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) facility segment	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Accounting Policies [Abstract]
Number of independent living facilities operated | facility			3
Accumulated amortization of deferred financing costs	$ 3,700,000		$ 3,700,000		$ 3,300,000
Reserve against receivables	0		0		$ 0
Stock-based compensation expense	$ 300,000	$ 400,000	$ 1,207,000	$ 1,095,000
Number of reportable segments | segment			1