v3.10.0.1
LONG-TERM DEBT LIABILITIES - Debt Extinguishment and Net Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Net Interest Expense        
Interest expense $ 25,911 $ 5,920 $ 74,870 $ 16,913
Amortization of deferred financing costs 798 586 2,389 1,752
Amortization of original issue discount of senior notes (715) 0 (2,147) 0
Interest expense on interest rate hedging agreements 0 0    
Interest income and other investment income (71) (30) (79) (79)
Total net interest expense $ 25,923 $ 6,476 75,033 18,586
Extinguishment of Debt [Line Items]        
Gains (Losses) on Extinguishment of Debt     $ 0 $ 0