v3.8.0.1
LONG-TERM DEBT LIABILITIES - Debt Extinguishment and Net Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Net Interest Expense    
Interest expense $ 23,334 $ 5,414
Amortization of deferred financing costs 795 586
Amortization of original issue discount of senior notes (716) 0
Interest income and other investment income (9) (23)
Total net interest expense $ 23,404 $ 5,977