Real Estate and Lending Activities - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended					1 Months Ended		9 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			9 Months Ended	1 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended			1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
	Mar. 01, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Y	Sep. 30, 2011	Sep. 30, 2012 United States	Sep. 30, 2012 Maximum	Sep. 30, 2012 Minimum	Jun. 15, 2012 HealthSouth Rehabilitation Hospital of Fayetteville	Aug. 21, 2012 Denham Springs Facility	Sep. 30, 2012 Thornton	Oct. 22, 2012 New Bedford Gain (Loss) on Disposition of Property	Dec. 31, 2012 New Bedford Asset Write Off	Sep. 30, 2012 Other Three Development Projects Project	Sep. 30, 2012 Other Three Development Projects Facility Project	Sep. 30, 2012 River Oaks facility	Sep. 30, 2012 Ernest	Sep. 30, 2012 Ernest	Feb. 29, 2012 Ernest	Sep. 30, 2012 Ernest Key Management Personnel	Sep. 30, 2012 Rehabilitation Hospital	Sep. 30, 2011 Acute Care Facility Y	Sep. 30, 2012 Acute Care Facility	Sep. 30, 2012 Bayonne Medical Center Property	Jul. 18, 2011 Vibra Specialty Hospital Y	Sep. 30, 2012 Vibra Specialty Hospital	Jul. 03, 2012 Prime Health Care Services	Sep. 30, 2012 Prime Health Care Services	Sep. 30, 2011 Prime Health Care Services	Sep. 30, 2012 Prime Health Care Services	Sep. 30, 2011 Prime Health Care Services	Dec. 31, 2011 Prime Health Care Services	Jul. 03, 2012 Prime Health Care Services Loans, net	Sep. 30, 2012 Florence Facility Y	Sep. 04, 2012 Monroe Hospital	Mar. 31, 2010 Monroe Hospital	Sep. 30, 2012 Monroe Hospital D	Jan. 31, 2011 Series of Individually Immaterial Business Acquisitions	Sep. 30, 2011 Series of Individually Immaterial Business Acquisitions Entity	Sep. 30, 2011 Series of Individually Immaterial Business Acquisitions Entity	Jan. 04, 2011 Series of Individually Immaterial Business Acquisitions Gilbert Hospital Y	Sep. 30, 2012 Series of Individually Immaterial Business Acquisitions Gilbert Hospital	Jan. 31, 2011 Series of Individually Immaterial Business Acquisitions Atrium Medical Center	Sep. 30, 2012 Series of Individually Immaterial Business Acquisitions Atrium Medical Center	Jan. 31, 2011 Series of Individually Immaterial Business Acquisitions Vibra Health Care	Feb. 04, 2011 Series of Individually Immaterial Business Acquisitions Bayonne Medical Center Y	Sep. 30, 2012 Series of Individually Immaterial Business Acquisitions Bayonne Medical Center	Sep. 30, 2012 Series of Individually Immaterial Business Acquisitions Alvarado Hospital	Feb. 09, 2011 Series of Individually Immaterial Business Acquisitions Alvarado Hospital	Feb. 14, 2011 Series of Individually Immaterial Business Acquisitions Northland Ltach Hospital	Sep. 30, 2012 Series of Individually Immaterial Business Acquisitions Northland Ltach Hospital	Sep. 19, 2012 Series of Individually Immaterial Business Acquisitions St. Mary's Regional Medical Center	Sep. 19, 2012 Series of Individually Immaterial Business Acquisitions Roxborough Memorial Hospital	May 04, 2012 Victoria, TX Acute Care Facility	Sep. 30, 2012 Twenty Twelve Acquisitions	Sep. 30, 2012 Twenty Twelve Acquisitions	Jun. 13, 2012 Ernest Rehabilitation Hospital	Sep. 30, 2012 Ernest Rehabilitation Hospital	Sep. 30, 2012 Ernest Rehabilitation Hospital
Significant Acquisitions and Disposals [Line Items]
Number of beds acquired																						40			40																19		60			278			306	35		380	140	26			40
Purchase price of real estate																			$ 200,000,000			$ 10,000,000			$ 13,000,000																$ 17,100,000		$ 23,500,000			$ 58,000,000			$ 70,000,000	$ 19,500,000		$ 80,000,000	$ 30,000,000
New mortgage loan funded																																	100,000,000
Number of beds at Centinela Hospital Medical Center used to secure loan																											369
Combined purchase price and investment amount																			396,500,000
First mortgage loan																			100,000,000
Acquisition loan made																	93,200,000	93,200,000	93,200,000
Capital contribution																			3,300,000	3,300,000
Number of facilities acquired																					5		7
Number of states																							7
Aggregate purchase price				200,000,000
Term of lease, year				20																		15			15									25												15
Number of lease extension options in current lease contract		3		3																																										6
Term of lease extension, years				5 years																																										5 years
Percentage of rental rate				9.00%			5.00%	2.00%
Loan secured by mortgage interest		100,000,000		100,000,000
Total investment																	96,500,000	96,500,000
Preferential rate of return on loan amount																		15.00%
Preferential return on remaining earnings																		79.00%
Coupon payable in cash, year one								6.00%
Coupon payable in cash, year two								7.00%
Coupon payable in cash in, thereafter				10.00%
Age of real estate acquired																																									4
Date acquired																							Sep. 30, 2011			Jul. 18, 2011																Jan. 04, 2011		Jan. 31, 2011			Feb. 04, 2011	Feb. 09, 2011			Feb. 14, 2011
Lease expiration date																																									2022-05		2024-06
Date of construction																																											2009
Payments to acquire equity method investments																						1,400,000			2,500,000																				1,300,000
Ownership interest in equity																						25.00%			25.00%													51.00%							19.00%
Working capital loan to the joint venture																						2,000,000																5,200,000
Retained ownership in operating entity																																						49.00%
Number of stories in building																								6
Lease expiration year																																																		2028				2028
Construction completion date																																																		2008-04
Revenue contributed by acquired entity																																					19,000,000		5,500,000	14,000,000															14,100,000	29,100,000
Income contributed by acquired entity		33,834,000	13,846,000	82,822,000	56,733,000																																		3,700,000	9,100,000															14,100,000	29,100,000
Acquisition related costs																																							500,000	3,200,000															100,000	3,800,000
Number of business acquisitions in period																																							7	7
Estimated total development cost															30,000,000																																							9,400,000			16,600,000
Expected facility completion date															between October 2012 and early 2013	First quarter of 2013																																						third quarter of 2013			2013 second quarter
Estimated total development cost, funded														17,600,000																																												7,200,000
Business acquisition agreement																																																											Jun. 13, 2012
Cost of land and building																																		30,000,000
Number of development projects														3	3
Number of facilities															3
Sale of real estate		42,000,000							16,000,000	5,200,000
Gain (loss) on sale of real estate									(1,400,000)	300,000	8,400,000	7,000,000
Straight-line rent write-off											1,600,000		4,100,000
Master lease term																											10 years
Master lease agreements, number of renewal options																											2
Master lease, optional lease term																											5 years
Lease escalation percentage																											100.00%
Advanced amount of working capital loan agreement																																					29,900,000
Interest receivable																																					5,800,000
Period past due, in days																																					90
Impairment of working capital loan recognized																																				12,000,000
Valuation allowance for rent																																					2,500,000
Net investment to maximum exposure																																					37,000,000
Impairment of working capital loan estimation-patient receivables considered for first priority secured interest																																					5,000,000
Impairment of working capital loan estimation-cash balance considered for first priority secured interest																																					100,000
Management agreement period																																			4 years
Amount of convertible note converted into equity interest	1,600,000
Convertible note	5,000,000
Percentage of equity shares from convertible debt	9.90%			15.10%
Remaining convertible debt after conversion of part of debt		$ 3,400,000		$ 3,400,000
Percentage of entity revenue from affiliates																	20.80%	18.10%										28.90%	31.90%	26.30%	31.70%
Percentage of total assets accounted						25.90%												18.40%												28.70%		25.30%
Maximum percentage of entity's total assets invested on single property		5.00%		5.00%