Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT AND CAPITAL LEASE - Covenants (Details)

v3.8.0.1
LONG-TERM DEBT AND CAPITAL LEASE - Covenants (Details) - Senior Secured Notes Due 2024 - Senior Notes
$ in Millions
Mar. 31, 2018
USD ($)
Feb. 02, 2018
Line of Credit Facility [Line Items]    
Cash and cash equivalents, allowed to deduct from adjusted EBITDA to debt ratio $ 15  
March 31, 2018    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   5.75
June 30, 2018    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   5.50
September 30, 2018    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   5.50
December 31, 2018    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   5.25
March 31, 2019    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   5.00
June 30, 2019    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   5.00
September 30, 2019    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.75
December 31, 2019    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.75
March 31, 2020    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.50
June 30, 2020    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.50
September 30, 2020    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.25
December 31, 2020    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.25
March 31, 2021    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.25
June 30, 2021    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.25
September 30, 2021 and the last day of each fiscal quarter thereafter    
Line of Credit Facility [Line Items]    
Maximum Total Leverage Ratio   4.00