Selected Quarterly Financial Data (Unaudited) - Narratives (Details)
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3 Months Ended |
12 Months Ended |
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Oct. 26, 2016 |
Apr. 11, 2016
property
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Dec. 31, 2016
USD ($)
property
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Sep. 30, 2016
USD ($)
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Jun. 30, 2016
USD ($)
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Mar. 31, 2016
USD ($)
|
Dec. 31, 2016
USD ($)
property
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Dec. 31, 2015
USD ($)
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Dec. 31, 2014
USD ($)
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Mar. 31, 2015
USD ($)
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| Business Acquisition |
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| Gain on change in control of interests |
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$ 49,922,000
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$ 0
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$ 0
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| Number of real estate properties | property |
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|
395
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395
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| Gain on sale of real estate, net of tax |
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$ 132,858,000
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2,197,000
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13,338,000
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| Loss on extinguishment of debt |
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$ (800,000)
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$ (16,000,000)
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$ (5,100,000)
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$ (2,500,000)
|
(24,376,000)
|
(275,000)
|
(263,000)
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| Impairment charges |
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29,706,000
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1,023,000
|
570,000
|
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| Equity in earnings of equity method investments in real estate |
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3,262,000
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14,667,000
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24,073,000
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| Goodwill impairment |
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0
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| Ishops |
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| Business Acquisition |
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| Deferred gain on the sale of property |
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2,200,000
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$ 2,200,000
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| Level 3 | Nonrecurring |
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| Business Acquisition |
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| Impairment charges |
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31,625,000
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$ 1,023,000
|
$ 1,336,000
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| Self storage | Madison Storage NYC, LLC and Veritas Group IX-NYC, LLC |
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| Business Acquisition |
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|
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| Gain on change in control of interests |
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49,900,000
|
|
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| Increase in ownership equity investments |
40.00%
|
15.00%
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| Number of real estate properties | property |
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5
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| Gain on sale of real estate, net of tax |
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$ 82,300,000
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$ 25,000,000
|
$ 25,400,000
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| All Other | Shelborne Property Associates, LLC | Third Party |
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| Business Acquisition |
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| Goodwill impairment |
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22,800,000
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| Contract termination income |
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10,600,000
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| Guaranteed loss compensation |
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$ 10,600,000
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