Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Revenue Recognition [Abstract]
Term of residency agreements - minimum (in days)	30 days
Term of residency agreements - maximum (in years)	1 year
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, current	$ 32,570	$ 38,862
Cash and escrow deposits - restricted, long term	33,382	56,376
Cash and escrow deposits - restricted, total	65,952	95,238
Accounts Receivable [Abstract]
Allowance for doubtful accounts	$ 26,500	26,500
Finite lived intangible assets - useful lives [Abstract]
Unamortized Debt Issuance Costs Reclassified Upon Adoption of ASU		$ 19,700
Buildings and Improvements [Member] \| Weighted Average [Member]
Estimated useful life of property, plant and equipment [Abstract]
Estimated Useful Life (in years)	40 years
Furniture and Equipment [Member] \| Minimum [Member]
Estimated useful life of property, plant and equipment [Abstract]
Estimated Useful Life (in years)	3 years
Furniture and Equipment [Member] \| Maximum [Member]
Estimated useful life of property, plant and equipment [Abstract]
Estimated Useful Life (in years)	7 years
Resident lease intangibles [Member]
Estimated useful life of property, plant and equipment [Abstract]
Estimated Useful Life (in years)		12 months
Resident lease intangibles [Member] \| Minimum [Member]
Estimated useful life of property, plant and equipment [Abstract]
Estimated Useful Life (in years)	1 year
Resident lease intangibles [Member] \| Maximum [Member]
Estimated useful life of property, plant and equipment [Abstract]
Estimated Useful Life (in years)	3 years
Other Intangible Assets [Abstract] \| Minimum [Member]
Finite lived intangible assets - useful lives [Abstract]
Estimated Useful Life (in years)	3 years
Other Intangible Assets [Abstract] \| Maximum [Member]
Finite lived intangible assets - useful lives [Abstract]
Estimated Useful Life (in years)	9 years
Tradenames [Member] \| Minimum [Member]
Finite lived intangible assets - useful lives [Abstract]
Estimated Useful Life (in years)	2 years
Tradenames [Member] \| Maximum [Member]
Finite lived intangible assets - useful lives [Abstract]
Estimated Useful Life (in years)	5 years
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair value of financial instruments [Abstract]
Debt at carrying value	$ 3,600,000	$ 3,500,000
Real estate taxes [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, current	18,862	17,926
Tenant security deposits [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, current	862	1,054
Insurance reserves [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, long term	15,318	19,299
Entrance fees [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, long term	13,233	13,214
Replacement reserve and other [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, current	8,011	15,535
Debt service and other deposits [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, long term	3,429	1,728
Other Restricted Cash [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, current	4,835	4,347
Cash and escrow deposits - restricted, long term	200	200
Letter of Credit Collateral [Member]
Cash and escrow deposits - restricted [Line Items]
Cash and escrow deposits - restricted, long term	$ 1,202	$ 21,935

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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