Real Estate and Loans Receivable - 2011 Activity - Additional Information (Detail) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended		0 Months Ended		12 Months Ended		0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended			0 Months Ended		12 Months Ended	0 Months Ended					12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Nov. 04, 2011 2011 Activity [Member] Hoboken, NJ [Member] Bed	Dec. 31, 2013 2011 Activity [Member] Hoboken, NJ [Member] Contract	Dec. 31, 2012 2011 Activity [Member] Hoboken, NJ [Member]	Nov. 04, 2011 2011 Activity [Member] Maximum [Member] Hoboken, NJ [Member]	Jul. 18, 2011 2011 Activity [Member] Vibra Specialty Hospital [Member] Bed	Dec. 31, 2013 2011 Activity [Member] Vibra Specialty Hospital [Member]	Dec. 31, 2013 2011 Activity [Member] Vibra Specialty Hospital [Member] Maximum [Member]	Sep. 30, 2011 2011 Activity [Member] Acute Care Facility [Member] Bed	Dec. 31, 2013 2011 Activity [Member] Acute Care Facility [Member] Contract	Oct. 14, 2011 2011 Activity [Member] Acute Care Hospitals [Member] Hospital	Dec. 31, 2013 2011 Activity [Member] Acute Care Hospitals [Member] Contract	Dec. 31, 2013 2011 Activity [Member] Acute Care Hospitals [Member] Minimum [Member]	Dec. 31, 2013 2011 Activity [Member] Acute Care Hospitals [Member] Maximum [Member]	Jan. 31, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member]	Jan. 04, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Gilbert Hospital [Member] Y Bed	Dec. 31, 2013 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Gilbert Hospital [Member]	Jan. 31, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Atrium Medical Center [Member] Contract Bed	Jan. 31, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Atrium Medical Center [Member] Minimum [Member]	Jan. 31, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Atrium Medical Center [Member] Maximum [Member]	Jan. 31, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Vibra [Member]	Feb. 04, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Bayonne Medical Center [Member] Bed	Dec. 31, 2013 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Bayonne Medical Center [Member] Property	Feb. 09, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Alvarado Hospital [Member] Bed	Dec. 31, 2013 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Alvarado Hospital [Member]	Feb. 14, 2011 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Northland Ltach Hospital [Member] Bed	Dec. 31, 2013 2011 Activity [Member] Series of Individually Immaterial Business Acquisitions [Member] Northland Ltach Hospital [Member]	Dec. 31, 2013 2011 Activity [Member] Business Acquisitions [Member] Hoboken, NJ [Member]	Dec. 31, 2012 2011 Activity [Member] Business Acquisitions [Member] Hoboken, NJ [Member]	Dec. 31, 2011 2011 Activity [Member] Business Acquisitions [Member] Hoboken, NJ [Member]
Significant Acquisitions and Disposals [Line Items]
Number of beds acquired					350				40			40							19		60				278		306		35
Age of real estate acquired																			4
Business acquisition cost of acquired entity									$ 13,000,000										$ 17,100,000		$ 23,500,000				$ 58,000,000		$ 70,000,000		$ 19,500,000
Date of properties acquired										Jul. 18, 2011			Sep. 30, 2011							Jan. 04, 2011	Jan. 31, 2011					Feb. 04, 2011		Feb. 09, 2011		Feb. 14, 2011
Lease expiration date																			2022-05		2024-06
Number of lease extension options in current lease contract						6				3			3		3					3	2				6					3
Term of lease extension, years						5 years					5 years		5 years		5 years					5 years	10 years					5 years				5 years
Rent escalations percentage																1.00%	3.00%			2.50%		1.00%	5.00%							2.75%
Date of construction																					2009
Payments to acquire equity method investments									2,500,000			1,400,000												1,300,000
Ownership interest in equity	100.00%				100.00%				25.00%			25.00%						51.00%						19.00%
Working capital loan to the joint venture								20,000,000				2,000,000						5,200,000
Retained ownership in operating entity																		49.00%
Term of lease, years						15 years				15 years			15 years		15 years											15 years
Number of stories in building																										6
Lease expiration year																													2028
Construction completion date																													2008-04
Existing mortgage loan	368,650,000	368,650,000	165,000,000	165,000,000																										15,000,000
Mortgage loan, maturity date																														2018-01
Business acquisition cost of acquired entity					75,000,000							10,000,000		30,000,000
Number of leased hospital														3
Agreement entry date																	Oct. 14, 2011
Business acquisition cost of acquired entity					50,000,000
Working capital loan outstanding							15,100,000
Funding of convertible note					5,000,000
Option to acquire percentage of hospital operator					25.00%
Revenue contributed by the acquired entity																																21,200,000
Income contributed by the acquired entity	133,258,000	135,402,000																														14,100,000
Acquisition related cost	19,494,000	5,420,000	4,184,000																												18,000,000	5,100,000	4,200,000
Acquisition-related costs on consummated deals																																$ 1,900,000