SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
   | 
9 Months Ended | 
Sep. 30, 2019  | 
| Accounting Policies [Abstract] | 
 
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| Schedule of realized/unrealized loss on investments and other income (loss), net | 
These items are comprised of the following:
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Three Months Ended September 30,  | 
   | 
Nine Months Ended September 30,  | 
 
   | 
2019  | 
   | 
2018  | 
   | 
2019  | 
   | 
2018  | 
 
Unrealized loss (gain) on non-hedge derivative instruments  | 
—  | 
 
  | 
   | 
48  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(283  | 
)  | 
 
Realized and unrealized (gain) loss on investments  | 
$  | 
—  | 
 
  | 
   | 
$  | 
48  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
(283  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Loss on lease modifications and terminations  | 
$  | 
—  | 
 
  | 
   | 
$  | 
(173  | 
)  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
(969  | 
)  | 
 
Gain (loss) on extinguishment of debt, net  | 
(126  | 
)  | 
   | 
75  | 
 
  | 
   | 
(148  | 
)  | 
   | 
(66  | 
)  | 
 
Collateral management fee income, net  | 
101  | 
 
  | 
   | 
142  | 
 
  | 
   | 
357  | 
 
  | 
   | 
443  | 
 
  | 
 
Equity in earnings of equity method investments  | 
348  | 
 
  | 
   | 
357  | 
 
  | 
   | 
1,033  | 
 
  | 
   | 
1,123  | 
 
  | 
 
Gain (loss) on sale of long-lived assets and intangibles  | 
7,096  | 
 
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   | 
(2,769  | 
)  | 
   | 
11,763  | 
 
  | 
   | 
(1,921  | 
)  | 
 
Other loss (A)  | 
(78  | 
)  | 
   | 
(684  | 
)  | 
   | 
(50  | 
)  | 
   | 
(5,767  | 
)  | 
 
Other income (loss), net  | 
$  | 
7,341  | 
 
  | 
   | 
$  | 
(3,052  | 
)  | 
   | 
$  | 
12,955  | 
 
  | 
   | 
$  | 
(7,157  | 
)  | 
 
  
 
 
  
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(A)  | 
During the nine months ended September 30, 2018, the Company recorded a net loss of approximately $4.9 million related to the settlement of a legal dispute and a related discharge of liabilities assumed by the counterparty to the settlement. See Note 13 for additional information.
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| Schedule of other current assets | 
The following table summarizes the Company's other current assets: 
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   | 
   | 
September 30, 2019  | 
   | 
December 31, 2018  | 
 
Prepaid expenses  | 
   | 
$  | 
2,948  | 
 
  | 
   | 
$  | 
2,651  | 
 
  | 
 
Deposits  | 
   | 
2,476  | 
 
  | 
   | 
2,494  | 
 
  | 
 
Inventory  | 
   | 
2,930  | 
 
  | 
   | 
2,855  | 
 
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Miscellaneous current assets, net  | 
   | 
10,261  | 
 
  | 
   | 
12,505  | 
 
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Other current assets  | 
   | 
$  | 
18,615  | 
 
  | 
   | 
$  | 
20,505  | 
 
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| Schedule of other assets | 
The following table summarizes the Company's other assets: 
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   | 
   | 
September 30, 2019  | 
   | 
December 31, 2018  | 
 
Prepaid expenses  | 
   | 
$  | 
196  | 
 
  | 
   | 
$  | 
277  | 
 
  | 
 
Deposits  | 
   | 
2,120  | 
 
  | 
   | 
2,140  | 
 
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Miscellaneous assets, net  | 
   | 
2,285  | 
 
  | 
   | 
6,267  | 
 
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Other assets  | 
   | 
$  | 
4,601  | 
 
  | 
   | 
$  | 
8,684  | 
 
  | 
 
  
 
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| Schedule of other current liabilities | 
The following table summarizes the Company's other current liabilities: 
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   | 
   | 
September 30, 2019  | 
   | 
December 31, 2018  | 
 
Security deposits payable  | 
   | 
$  | 
5,783  | 
 
  | 
   | 
$  | 
14,188  | 
 
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Operating lease liabilities  | 
   | 
16,307  | 
 
  | 
   | 
—  | 
 
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Accrued rent  | 
   | 
2,914  | 
 
  | 
   | 
2,885  | 
 
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Dividends payable  | 
   | 
930  | 
 
  | 
   | 
930  | 
 
  | 
 
Miscellaneous current liabilities  | 
   | 
2,763  | 
 
  | 
   | 
4,282  | 
 
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Other current liabilities  | 
   | 
$  | 
28,697  | 
 
  | 
   | 
$  | 
22,285  | 
 
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| Schedule of other liabilities | 
The following table summarized the Company's other liabilities: 
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   | 
   | 
September 30, 2019  | 
   | 
December 31, 2018  | 
 
Security deposits payable  | 
   | 
$  | 
298  | 
 
  | 
   | 
$  | 
91  | 
 
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Service obligation intangible  | 
   | 
1,865  | 
 
  | 
   | 
2,759  | 
 
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Accrued rent  | 
   | 
—  | 
 
  | 
   | 
1,617  | 
 
  | 
 
Miscellaneous liabilities  | 
   | 
1,531  | 
 
  | 
   | 
765  | 
 
  | 
 
Other liabilities  | 
   | 
$  | 
3,694  | 
 
  | 
   | 
$  | 
5,232  | 
 
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