RELATED-PARTY TRANSACTIONS - Executive Bonus Plan (Details) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($)
Deferred Bonus
Related Party Transaction [Line Items]
Bonus pool as a percentage of adjusted total net gain from assets sold	8.75%
Adjustment factor	100.00%
Bonus pool earned by participants	$ 88
Percent of bonus pool to be distributed in cash in following year	70.00%
Percent of bonus pool to be distributed via RSUs	30.00%
Stock settlement period	3 years
Mr. Webb, CEO
Related Party Transaction [Line Items]
Bonus allocation	66.67%
Mr. Webb, CEO \| Deferred Bonus
Related Party Transaction [Line Items]
Bonus allocation	55.00%
Mr. Perri, CFO
Related Party Transaction [Line Items]
Bonus allocation	33.33%
Mr. Perri, CFO \| Deferred Bonus
Related Party Transaction [Line Items]
Bonus allocation	32.50%
Other Employees \| Deferred Bonus
Related Party Transaction [Line Items]
Bonus allocation	12.50%

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Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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