Real Estate and Accumulated Depreciation (Schedule III Real Estate and Accumulated Depreciation, Held-for-sale) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 3,472,255
Initial Cost of Land		2,572,238
Initial Cost of Buildings & Improvements		27,040,378
Cost Capitalized Subsequent to Acquisition		1,373,415
Carrying Amount of Land		2,563,445
Carrying Amount of Buildings and Improvements		27,302,045
Accumulated Depreciation		3,796,297	$ 3,020,908	$ 2,386,658	$ 1,555,055
Assets Held-for-sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		0
Initial Cost of Land		106,048
Initial Cost of Buildings & Improvements		1,136,527
Cost Capitalized Subsequent to Acquisition		47,904
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		169,950
Accumulated Depreciation	[1]	0
Assets Held-for-sale [Member] | Akron, OH, AKR3, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		0
Initial Cost of Land		300
Initial Cost of Buildings & Improvements		20,200
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2009
Year Built		Jan. 01, 2008
Assets Held-for-sale [Member] | Amelia Island, FL, AMI, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		3,290
Initial Cost of Buildings & Improvements		24,310
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1998
Assets Held-for-sale [Member] | Austin, TX, ATN2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		730
Initial Cost of Buildings & Improvements		18,970
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2006
Assets Held-for-sale [Member] | Baytown, TX, BYT, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		450
Initial Cost of Buildings & Improvements		6,150
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2002
Year Built		Jan. 01, 2000
Assets Held-for-sale [Member] | Baytown, TX, BYT2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		540
Initial Cost of Buildings & Improvements		11,110
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2009
Year Built		Jan. 01, 2008
Assets Held-for-sale [Member] | Bellaire, TX, 1161, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		4,551
Initial Cost of Buildings & Improvements		46,105
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2005
Assets Held-for-sale [Member] | Bellaire, TX, 1163, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		2,972
Initial Cost of Buildings & Improvements		33,445
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2005
Assets Held-for-sale [Member] | Bellevue, WI, BVU, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,740
Initial Cost of Buildings & Improvements		18,260
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2004
Assets Held-for-sale [Member] | Bellingham, MA, BLH, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		9,270
Initial Cost of Buildings & Improvements		0
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		2,156
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2015
Assets Held-for-sale [Member] | Bridgeton, MO, 1267, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		0
Initial Cost of Buildings & Improvements		30,221
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 2011
Assets Held-for-sale [Member] | Brookline, MA, BRL, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		2,760
Initial Cost of Buildings & Improvements		9,217
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 1984
Assets Held-for-sale [Member] | Columbus, OH, 1353, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		0
Initial Cost of Buildings & Improvements		0
Cost Capitalized Subsequent to Acquisition		6,710
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		6,710
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2012
Year Built		Jan. 01, 2013
Assets Held-for-sale [Member] | Coral Springs, FL, 1119, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,598
Initial Cost of Buildings & Improvements		10,627
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		9,246
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 1992
Assets Held-for-sale [Member] | Corpus Christi, TX, CPS4, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		400
Initial Cost of Buildings & Improvements		1,916
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1985
Assets Held-for-sale [Member] | DeForest, WI, DEF, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		250
Initial Cost of Buildings & Improvements		5,350
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2006
Assets Held-for-sale [Member] | Denton, TX, 1174, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		0
Initial Cost of Buildings & Improvements		19,407
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2005
Assets Held-for-sale [Member] | Denver, CO, DVR, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		2,530
Initial Cost of Buildings & Improvements		9,514
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1986
Assets Held-for-sale [Member] | Fayetteville, GA, 1138, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		959
Initial Cost of Buildings & Improvements		7,540
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		6,733
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 1999
Assets Held-for-sale [Member] | Frisco, TX, FRS3, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		130
Initial Cost of Buildings & Improvements		16,445
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2012
Year Built		Jan. 01, 2010
Assets Held-for-sale [Member] | Germantown, TN, 1102, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		3,049
Initial Cost of Buildings & Improvements		12,456
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		12,202
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2002
Assets Held-for-sale [Member] | Grand Blanc, MI, GDB, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		700
Initial Cost of Buildings & Improvements		7,843
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 2012
Assets Held-for-sale [Member] | Greenfield, WI, GFD, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		600
Initial Cost of Buildings & Improvements		6,626
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2006
Assets Held-for-sale [Member] | Greenville, SC, GNV2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		5,400
Initial Cost of Buildings & Improvements		100,523
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2009
Assets Held-for-sale [Member] | Hattiesburg, MS, HAT2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		450
Initial Cost of Buildings & Improvements		15,518
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		14,089
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2010
Year Built		Jan. 01, 2012
Assets Held-for-sale [Member] | Hermitage, TN, HRM, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,500
Initial Cost of Buildings & Improvements		9,856
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		10,213
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 1983
Assets Held-for-sale [Member] | Houston, TX, HOU6, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		860
Initial Cost of Buildings & Improvements		18,715
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2006
Assets Held-for-sale [Member] | Houston, TX, HTN2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		630
Initial Cost of Buildings & Improvements		5,970
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2002
Year Built		Jan. 01, 1995
Assets Held-for-sale [Member] | Kenosha, WI, KNO, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,500
Initial Cost of Buildings & Improvements		9,139
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2009
Assets Held-for-sale [Member] | Lapeer, MI, LPE, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		220
Initial Cost of Buildings & Improvements		7,625
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 2012
Assets Held-for-sale [Member] | McHenry, IL, MHY2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		3,550
Initial Cost of Buildings & Improvements		15,300
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2004
Assets Held-for-sale [Member] | Melbourne, FL, MEL2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		2,540
Initial Cost of Buildings & Improvements		21,319
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2010
Year Built		Jan. 01, 2012
Assets Held-for-sale [Member] | Memphis, TN, MPS4, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		390
Initial Cost of Buildings & Improvements		9,660
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2010
Year Built		Jan. 01, 1981
Assets Held-for-sale [Member] | Merrillville, IN, MRV4, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,080
Initial Cost of Buildings & Improvements		3,413
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2010
Year Built		Jan. 01, 2011
Assets Held-for-sale [Member] | Merrillville, IN, MRV, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		643
Initial Cost of Buildings & Improvements		7,084
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 1997
Year Built		Jan. 01, 1999
Assets Held-for-sale [Member] | Millersville, MD, MLS, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		680
Initial Cost of Buildings & Improvements		1,020
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		680
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 2000
Assets Held-for-sale [Member] | Morrow, GA, 1192, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		818
Initial Cost of Buildings & Improvements		8,064
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		5,913
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 1990
Assets Held-for-sale [Member] | Mount Airy, NC, MTA, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		270
Initial Cost of Buildings & Improvements		6,430
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1998
Assets Held-for-sale [Member] | Murrieta, CA, MUR, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		8,800
Initial Cost of Buildings & Improvements		202,412
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2008
Year Built		Jan. 01, 2010
Assets Held-for-sale [Member] | Myrtle Beach, SC, MYB, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		6,890
Initial Cost of Buildings & Improvements		41,526
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2009
Assets Held-for-sale [Member] | Neenah, WI, NEN, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		630
Initial Cost of Buildings & Improvements		15,120
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2010
Year Built		Jan. 01, 1991
Assets Held-for-sale [Member] | Orange Village, OH, 1171, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		610
Initial Cost of Buildings & Improvements		7,419
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		6,096
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 1985
Assets Held-for-sale [Member] | Oshkosh, WI, OSH, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		900
Initial Cost of Buildings & Improvements		3,800
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2005
Assets Held-for-sale [Member] | Oshkosh, WI, OSH2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		400
Initial Cost of Buildings & Improvements		23,237
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2008
Assets Held-for-sale [Member] | Overland Park, KS, OVP, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,120
Initial Cost of Buildings & Improvements		8,360
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1970
Assets Held-for-sale [Member] | Panama City Beach, FL, PCY2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		900
Initial Cost of Buildings & Improvements		7,717
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		7,716
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 1996
Assets Held-for-sale [Member] | Pasadena, TX, PAS, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		720
Initial Cost of Buildings & Improvements		24,080
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2005
Assets Held-for-sale [Member] | Pawleys Island, SC, PWI, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		2,020
Initial Cost of Buildings & Improvements		32,590
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1997
Assets Held-for-sale [Member] | Saint Simons Island, GA, SIM, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		6,440
Initial Cost of Buildings & Improvements		50,060
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2008
Year Built		Jan. 01, 2007
Assets Held-for-sale [Member] | San Antonio, TX, SNN7, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		560
Initial Cost of Buildings & Improvements		7,315
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2002
Year Built		Jan. 01, 2000
Assets Held-for-sale [Member] | San Antonio, TX, SNN8, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		640
Initial Cost of Buildings & Improvements		13,360
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2007
Year Built		Jan. 01, 2004
Assets Held-for-sale [Member] | Scituate, MA, SCI, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,740
Initial Cost of Buildings & Improvements		10,640
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1976
Assets Held-for-sale [Member] | Sheboygan, WI, SHE, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		80
Initial Cost of Buildings & Improvements		5,320
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 2006
Assets Held-for-sale [Member] | Silver Spring, MD, SSP2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,150
Initial Cost of Buildings & Improvements		9,252
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2012
Year Built		Jan. 01, 1968
Assets Held-for-sale [Member] | Spartanburg, SC, SPB, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		3,350
Initial Cost of Buildings & Improvements		15,750
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1997
Assets Held-for-sale [Member] | St. Louis, MO, STL3, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,890
Initial Cost of Buildings & Improvements		12,165
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		12,472
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2010
Year Built		Jan. 01, 1999
Assets Held-for-sale [Member] | Tampa, FL, 1328, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		0
Initial Cost of Buildings & Improvements		0
Cost Capitalized Subsequent to Acquisition		17,685
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		17,685
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2012
Year Built		Jan. 01, 1984
Assets Held-for-sale [Member] | Thomasville, GA, THO, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		530
Initial Cost of Buildings & Improvements		13,899
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		13,193
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 1987
Assets Held-for-sale [Member] | Tucson, AZ, TCS2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		930
Initial Cost of Buildings & Improvements		13,399
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1985
Assets Held-for-sale [Member] | Virginia Beach, VA, 1294, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		0
Initial Cost of Buildings & Improvements		0
Cost Capitalized Subsequent to Acquisition		16,555
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		16,555
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2011
Year Built		Jan. 01, 2007
Assets Held-for-sale [Member] | Waukesha, WI, WAK, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		1,100
Initial Cost of Buildings & Improvements		14,910
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2008
Year Built		Jan. 01, 2009
Assets Held-for-sale [Member] | Webster, TX, WBR, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		360
Initial Cost of Buildings & Improvements		5,940
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2002
Year Built		Jan. 01, 2000
Assets Held-for-sale [Member] | West Palm Beach, FL, 1146, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		628
Initial Cost of Buildings & Improvements		14,740
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		10,762
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 1993
Assets Held-for-sale [Member] | West Palm Beach, FL, 1149, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		610
Initial Cost of Buildings & Improvements		14,618
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		10,575
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2006
Year Built		Jan. 01, 1991
Assets Held-for-sale [Member] | Westerville, OH, 1354, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		0
Initial Cost of Buildings & Improvements		0
Cost Capitalized Subsequent to Acquisition		6,954
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		6,954
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2012
Year Built		Jan. 01, 2010
Assets Held-for-sale [Member] | Winston-Salem, NC, WSM2, Held for Sale [Member]
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost of Encumbrances		$ 0
Initial Cost of Land		5,700
Initial Cost of Buildings & Improvements		13,550
Cost Capitalized Subsequent to Acquisition		0
Carrying Amount of Land		0
Carrying Amount of Buildings and Improvements		0
Accumulated Depreciation	[1]	$ 0
Year Acquired		Jan. 01, 2005
Year Built		Jan. 01, 1997

[1] Represents real property asset associated with a capital lease.