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CONDENSED CONSOLIDATED STATEMENTS OF CASHFLOWS (Parenthetical)
Jun. 30, 2018
10.75% Senior Secured Notes  
Stated interest rate (as percent) 10.75%
Senior Notes | 12% Senior Secured Notes  
Stated interest rate (as percent) 12.00%
Senior Notes | 10.75% Senior Secured Notes  
Stated interest rate (as percent) 10.75%
Senior Notes | 12% Senior Cash Pay Notes  
Stated interest rate (as percent) 12.00%