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           INVESTMENTS IN SENIOR HOUSING REAL ESTATE - Rollforward of Investments in Senior Housing Real Estate (Details 2) (Senior Housing, USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 
           Dec. 31, 2013 
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           Dec. 31, 2012 
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           Senior Housing 
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| Gross Carrying Amount | |||||||||
| Balance, beginning of year | $ 164,359 | ||||||||
| Additions: | |||||||||
| Acquisitions of real estate | 1,205,558 | 164,067 | |||||||
| Improvements | 3,450 | 296 | |||||||
| Transferred from assets held for sale | |||||||||
| Disposals: | |||||||||
| Disposal of long-lived assets | (45) | (4) | |||||||
| Balance, end of year | 1,373,322 | [1],[2] | 164,359 | ||||||
| Accumulated Depreciation | |||||||||
| Balance, beginning of year | (1,558) | ||||||||
| Additions: | |||||||||
| Depreciation expenses | (8,874) | (1,559) | |||||||
| Transferred from assets held for sale | |||||||||
| Disposals: | |||||||||
| Disposal of long-lived assets | 10 | 1 | |||||||
| Balance, end of year | $ (10,422) | [1],[3] | $ (1,558) | ||||||
          
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- Definition 
          Amount of transfers to real estate investments. No definition available. 
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- Definition 
          Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of other additions to accumulated depreciation other than depreciation expense for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of decrease to accumulated depreciation for real estate investments sold for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount, before accumulated depreciation, of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of increase in real estate investments related to improvements for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of increase in real estate investments from acquisitions other than through foreclosure for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of other deductions to real estate investments, excluding sales, for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of depreciation expense of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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