Schedule III - Real Estate Investments and Accumulated Depreciation (Detail) (USD $) In Thousands, unless otherwise specified							12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2013 Baden-Wurttemburg, Germany [Member]	Dec. 31, 2013 Saxony, Germany [Member]	Dec. 31, 2013 Rhineland-Pflaz, Germany [Member]	Dec. 31, 2013 Brandenburg, Germany [Member]	Dec. 31, 2013 Hesse, Germany [Member]	Dec. 31, 2013 Little Elm, TX [Member]	Dec. 31, 2013 Port Arthur, TX [Member]	Dec. 31, 2013 West Monroe, LA [Member]	Dec. 31, 2013 Hausman, TX [Member]	Dec. 31, 2013 Lafayette, IN [Member]	Dec. 31, 2013 Mesa, AZ [Member]	Dec. 31, 2013 Overlook, TX [Member]	Dec. 31, 2013 Post Falls, ID [Member]	Dec. 31, 2013 Spartanburg, SC [Member]	Dec. 31, 2013 Victoria, TX [Member]	Dec. 31, 2013 Covington, LA [Member]	Dec. 31, 2013 Redding, CA [Member]	Dec. 31, 2013 Bloomington, IN	Dec. 31, 2013 Dallas, TX [Member]	Dec. 31, 2013 La Palma, CA [Member]	Dec. 31, 2013 Anaheim, CA [Member]	Dec. 31, 2013 Luling, TX [Member]	Dec. 31, 2013 Victoria, TX [Member]	Dec. 31, 2013 Houston, TX [Member]	Dec. 31, 2013 Bensalem, PA [Member]	Dec. 31, 2013 Portland, OR [Member]	Dec. 31, 2013 San Diego, CA [Member]	Dec. 31, 2013 Redding, CA [Member]	Dec. 31, 2013 Houston, TX [Member]	Dec. 31, 2013 Bennettsville, SC [Member]	Dec. 31, 2013 Bossier City, LA [Member]	Dec. 31, 2013 Bristol, CT [Member]	Dec. 31, 2013 Cheraw, SC [Member]	Dec. 31, 2013 Detroit, MI [Member]	Dec. 31, 2013 Enfield, CT [Member]	Dec. 31, 2013 Fort Lauderdale, FL [Member]	Dec. 31, 2013 Garden Grove, CA [Member]	Dec. 31, 2013 Garden Grove, CA [Member]	Dec. 31, 2013 Idaho Falls, ID [Member]	Dec. 31, 2013 Newington, CT [Member]	Dec. 31, 2013 Petersburg, VA [Member]	Dec. 31, 2013 West Valley City, UT [Member]	Dec. 31, 2013 Poplar Bluff, MO [Member]	Dec. 31, 2013 East Providence, RI [Member]	Dec. 31, 2013 San Dimas, CA [Member]	Dec. 31, 2013 San Dimas, CA [Member]	Dec. 31, 2013 West Springfield, MA [Member]	Dec. 31, 2013 Warwick, RI [Member]	Dec. 31, 2013 Wichita, KS [Member]	Dec. 31, 2013 Addison, TX [Member]	Dec. 31, 2013 Shenandoah, TX [Member]	Dec. 31, 2013 Richardson, TX [Member]	Dec. 31, 2013 Hill County, TX [Member]	Dec. 31, 2013 Webster, TX [Member]	Dec. 31, 2013 Tomball, TX [Member]	Dec. 31, 2013 Gilbert, AZ [Member]	Dec. 31, 2013 Corinth, TX [Member]	Dec. 31, 2013 Bayonne, NJ [Member]	Dec. 31, 2013 San Diego, CA [Member]	Dec. 31, 2013 Northland, MO [Member]	Dec. 31, 2013 DeSoto, TX [Member]	Dec. 31, 2013 New Braunfels, TX [Member]	Dec. 31, 2013 Hoboken, NJ [Member]	Dec. 31, 2013 Florence, AZ [Member]	Dec. 31, 2013 Hammond, LA [Member]	Dec. 31, 2013 San Antonio, TX [Member]	Dec. 31, 2013 1994 [Member] Baden-Wurttemburg, Germany [Member]	Dec. 31, 2013 1996 [Member] Saxony, Germany [Member]	Dec. 31, 2013 1960 [Member] Rhineland-Pflaz, Germany [Member]	Dec. 31, 2013 1981 [Member] Hesse, Germany [Member]	Dec. 31, 2013 1992 [Member] Rhineland-Pflaz, Germany [Member]	Dec. 31, 2013 1904 [Member] Saxony, Germany [Member]	Dec. 31, 2013 1980 [Member] Rhineland-Pflaz, Germany [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 49,878																													$ 41,200																									$ 8,678
Type of property							Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Acute care general hospital	Acute care general hospital	Acute care general hospital	Acute care general hospital	Rehabilitation hospital	Acute care general hospital	Acute care general hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Long term acute care hospital	Long term acute care hospital	Acute care general hospital	Long term acute care hospital	Acute care general hospital	Acute care general hospital	Long term acute care hospital	Long term acute care hospital	Acute care general hospital	Acute care general hospital	Long term acute care hospital	Acute care general hospital	Acute care general hospital	Acute care general hospital	Acute care general hospital	Long term acute care hospital	Wellness Center	Acute care general hospital	Long term acute care hospital	Wellness Center	Rehabilitaion hospital	Acute care general hospital	Medical Office Building	Acute care general hospital	Wellness Center	Rehabilitaion hospital	Acute care general hospital	Acute care general hospital	Wellness Center	Acute care general hospital	Medical Office Building	Wellness Center	Wellness Center	Rehabilitaion hospital	Rehabilitaion hospital	Rehabilitaion hospital	Rehabilitaion hospital	Acute care general hospital	Long term acute care hospital	Long term acute care hospital	Acute care general hospital	Long term acute care hospital	Acute care general hospital	Acute care general hospital	Long term acute care hospital	Long term acute care hospital	Long term acute care hospital	Acute care general hospital	Acute care general hospital	Long term acute care hospital	Acute care general hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital	Rehabilitation hospital
Initial costs, land	151,814						4,327	682	7,382	438	3,894	1,241	2,178	10,555	1,500	800	3,875	2,452	417	1,135		821		2,457	1,000	937	1,875	811	625	4,757	6,911	3,085	6,550	1,555	3,501	794	900	485	657	1,220	384	3,499	5,502	862	1,822	270	1,302	5,516	2,659	209	6,160	1,915	583	1,265	1,019	2,013	2,033	2,219	1,120	663	1,298	150	1,288	2,003	12,663	834	1,067	1,100	1,387	900	519	2,248		471	4,017	116		682	921
Initial costs, buildings	1,547,919						7,372	18,907	20,382	22,615	18,730	2,963	74,225	71,429	8,958	14,968	101,248	9,666	12,175	15,717	9,355	10,238	19,952	31,209	13,589	10,907	21,814	9,345	7,197	56,238	38,185	17,859	15,653	53,863	34,530	15,772	17,818	2,267	19,576	8,687	2,257	21,939	10,748	7,888	37,467	1,615	9,121	58,314	38,694	1,265	6,839	5,085	3,185	759	18,373	22,531	21,943	17,419	17,882	33,751	23,982	15,553	21,175	51,495	52,431	17,182	10,701	7,883	44,351	28,636	8,941	5,390	11,968	25,956	18,989	6,625	37,579	18,907	8,281
Additions subsequent to acquisition, improvements	7,832																																																														313				86
Additions subsequent to acquisition, carrying costs	25,629																					14	4,361	408	368	3	10			1,259	(353)	2,559	77	13	12,468					(365)		1	51	28	4,665				1		34	18			1												8
Land at cost	154,858						4,327	682	7,382	438	3,894	1,241	2,178	10,555	1,500	800	3,875	2,452	417	1,135		821	1,629	2,576	1,421	937	1,875	811	625	5,464	6,911	3,071	6,550	1,555	3,274	794	900	485	657	1,220	384	3,499	5,502	862	1,822	270	1,302	5,516	2,660	209	6,160	1,915	583	1,265	1,019	2,013	2,033	2,219	1,120	663	1,298	150	1,601	2,003	12,663	834	1,161	1,100	1,387	900	519	2,249		471	4,017	116		682	921
Buildings at cost	1,578,336						7,372	18,907	20,382	22,615	18,730	2,963	74,225	71,429	8,958	14,968	101,248	9,666	12,175	15,717	9,355	10,252	22,684	31,498	13,536	10,910	21,824	9,345	7,197	56,790	37,832	20,432	15,730	53,876	54,658	15,772	17,818	2,267	19,576	8,322	2,257	21,940	10,799	7,916	42,132	1,615	9,121	58,314	38,694	1,265	6,873	5,103	3,185	759	18,374	22,531	21,943	17,419	17,882	33,751	23,982	15,553	21,175	51,495	52,432	17,182	10,701	7,883	44,351	28,462	8,941	5,879	11,968	25,956	18,989	6,625	37,579	18,907	8,281
Total at cost	1,733,194	1,189,552	[1]	1,191,096	[2]	990,635	11,699	19,589	27,764	23,053	22,624	4,204	76,403	81,984	10,458	15,768	105,123	12,118	12,592	16,852	9,355	11,073	24,313	34,074	14,957	11,847	23,699	10,156	7,822	62,254	44,743	23,503	22,280	55,431	57,932	16,566	18,718	2,752	20,233	9,542	2,641	25,439	16,301	8,778	43,954	1,885	10,423	63,830	41,354	1,474	13,033	7,018	3,768	2,024	19,393	24,544	23,976	19,638	19,002	34,414	25,280	15,703	22,776	53,498	65,094	18,016	11,862	8,983	45,738	29,362	9,460	8,128	11,968	26,427	23,006	6,741	37,579	19,589	9,202
Accumulated depreciation	$ 144,235	$ 110,888	[3]	$ 93,430	[4]	$ 68,662	$ 25	$ 48	$ 67	$ 68	$ 53	$ 6	$ 464	$ 449	$ 169	$ 328	$ 633	$ 203	$ 25	$ 145		$ 2,200	$ 4,621	$ 5,800	$ 2,481	$ 1,954	$ 3,910	$ 1,655	$ 1,275	$ 10,006	$ 6,602	$ 3,356	$ 2,619	$ 8,653	$ 4,948	$ 2,268	$ 2,559	$ 1,047	$ 2,814	$ 1,243	$ 1,043	$ 3,114	$ 1,385	$ 1,007	$ 5,913	$ 748	$ 1,254	$ 8,278	$ 5,493	$ 586	$ 874	$ 650	$ 1,475	$ 351	$ 2,641	$ 1,971	$ 1,920	$ 1,524	$ 3,897	$ 2,531	$ 1,799	$ 1,166	$ 1,570	$ 7,510	$ 3,823	$ 1,253	$ 655	$ 443	$ 4,730	$ 1,236	$ 242	$ 166	$ 29	$ 73	$ 48	$ 19	$ 103	$ 48	$ 21
Date of construction							1986	1995	1930	1994	1977	2013	2005	1962	2013	2013	2007	2012	2013	2013	2013	1984	1991	2006	2006	1971	1964	2002	1998	2006	2006	1964	1964	1974	1960	1984	1982	1975	1982	1956	1974	1985	1982	1982	2002	1979	2006	1980	1980	1979	1972	1979	1976	1979	1992	2008	2008	2008	1980	2004	2005	2005	2008	1918	1973	2007	2008	2007	1863	2012	2003	2012	1994	1996	1960	1981	1992	1904	1980
Date acquired							Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Dec. 01, 2013	Sep. 26, 2013	Sep. 26, 2013	Mar. 01, 2013	Feb. 01, 2013	Sep. 26, 2013	Feb. 01, 2013	Dec. 31, 2013	Aug. 01, 2013	Dec. 31, 2013	Jun. 09, 2005	Jun. 30, 2005	Aug. 08, 2006	Sep. 05, 2006	Nov. 08, 2006	Nov. 08, 2006	Dec. 01, 2006	Dec. 01, 2006	Dec. 01, 2006	Mar. 19, 2007	Apr. 18, 2007	May 09, 2007	Aug. 10, 2007	Aug. 10, 2007	Apr. 01, 2008	Apr. 01, 2008	Apr. 22, 2008	Apr. 01, 2008	May 22, 2008	Apr. 22, 2008	Apr. 22, 2008	Nov. 25, 2008	Nov. 25, 2008	Apr. 01, 2008	Apr. 22, 2008	Jul. 01, 2008	Apr. 22, 2008	Apr. 22, 2008	Apr. 22, 2008	Nov. 25, 2008	Nov. 25, 2008	Apr. 22, 2008	Apr. 22, 2008	Apr. 04, 2008	Jun. 17, 2010	Jun. 17, 2010	Jun. 17, 2010	Sep. 17, 2010	Dec. 21, 2010	Dec. 21, 2010	Jan. 04, 2011	Jan. 31, 2011	Feb. 04, 2011	Feb. 09, 2011	Feb. 14, 2011	Jul. 18, 2011	Sep. 30, 2011	Nov. 04, 2011	Nov. 04, 2010	Dec. 14, 2012	Oct. 14, 2011	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013	Nov. 29, 2013
Life on which depreci- ation in latest income state- ments is computed (Years)							40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	10 years	40 years	40 years	10 years	40 years	40 years	40 years	40 years	10 years	40 years	40 years	40 years	10 years	40 years	40 years	10 years	10 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	20 years	40 years	40 years	40 years	40 years	20 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years	40 years

[1] Includes real estate cost included in real estate held for sale of $28,617 at December 31, 2012. Excludes intangible lease assets that are included in real estate held for sale of $858 for 2012.

[2] Includes real estate cost included in real estate held for sale of $96,766 at December 31, 2011. Excludes intangible lease assets that are included in real estate held for sale of $3,012 for 2011.

[3] Includes in accumulated depreciation in real estate held for sale of $3,511 for 2012. Excludes accumulated amortization related to intangible lease assets that are included in real estate held for sale of $426 for 2012.

[4] Includes accumulated depreciation in real estate held for sale of $11,807 for 2011. Excludes accumulated amortization related to intangible lease assets that are included in real estate held for sale of $1,949 for 2011.