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RELATED-PARTY TRANSACTIONS - Former Related Party Indemnification Costs (Details) - USD ($) $ in Thousands |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 06, 2015 | Sep. 30, 2017 | Dec. 31, 2016
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties | $ 263 |  |
Special Committee Investigation Indemnification | Former President And Chief Executive Officer |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  | $ 2,100 | $ 573
Special Committee Investigation Indemnification | Former Management Vice Chair |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  | 999 | 57
Special Committee Investigation Indemnification | Former Interim Chief Financial Officer and Chief Strategy Officer and Former Chief Financial Officer |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  | 584 | 135
Special Committee Investigation Indemnification | Former Director |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related parties |  | $ 461 | $ 29

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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