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SUMMARY OF SIGNIFICANT EVENTS AND ACCOUNTING POLICIES - 401 (k) Plan (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2016 | Sep. 09, 2016 | Sep. 30, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2015
401(k) Plan |  |  |  |  |  |
Eligibility age for employees to participate in the plan |  |  |  | 18 years |  |
Company's matching contributions | $ 0.8 | $ 2.0 |  | $ 1.5 | $ 2.2 |
Company's matching contributions dollar-for-dollar on employee's pre-tax earnings (as a percent) | 10.00% |  | 10.00% | 10.00% |  | 10.00%

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- Definition The minimum eligibility age for employees to participate in the defined contribution plan. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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