Investments in Real Estate - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended	9 Months Ended		1 Months Ended	12 Months Ended		12 Months Ended				3 Months Ended		6 Months Ended
	Feb. 28, 2013 Subsidiary Buildings	Jun. 30, 2013	Sep. 30, 2011 Home	Dec. 31, 2012	Jun. 24, 2013 Care YBE Subsidiary LLC [Member]	Dec. 31, 2008 Care YBE Subsidiary LLC [Member] Home	Dec. 31, 2008 Bickford [Member] Unit	Dec. 31, 2008 Bickford [Member] Iowa [Member] Home	Dec. 31, 2008 Bickford [Member] Illinois [Member] Home	Dec. 31, 2008 Bickford [Member] Nebraska [Member] Home	Dec. 31, 2008 Bickford [Member] Indiana [Member] Home	Jun. 30, 2013 Calamar And Greenfield [Member]	Jun. 30, 2012 Calamar And Greenfield [Member]	Jun. 30, 2013 Calamar And Greenfield [Member]	Jun. 30, 2012 Calamar And Greenfield [Member]	Feb. 28, 2013 Care Cal JV LLC [Member]	Feb. 28, 2013 Calamar Enterprises, Inc. [Member] Care Cal JV LLC [Member]
Business Acquisition [Line Items]
Number of memory care facilities acquired			3
Aggregate purchase price			$ 20,800,000
Amount of mortgage bridge loan			15,500,000
Initial term of lease			12 years
Rent payments			1,700,000
Rental increases			2.75%
Percentage of membership interests					100.00%
Number of units in real estate properties							643
Senior living properties						14		6	5	2	1
Percentage of interest acquired																75.00%	25.00%
Management agreement term	10 years
Number of subsidiaries	2
Aggregate valuation of the properties	23,300,000
Aggregate debt balance	18,400,000	33,500,000		94,800,000
Lockout period for sale of property	7 years
Number of properties purchased	2
Revenue from acquisition		1,000,000
Net income from acquisition		$ 100,000
Percentage of revenue												66.00%	71.00%	69.00%	71.00%