v3.8.0.1
ACCRUED LIABILITIES Table - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Accrued Liabilities, Current [Abstract]    
Employee wages and benefit costs $ 16,963 $ 30,807
Unearned income 18,243 14,355
Other 26,372 15,323
Accrued liabilities $ 61,578 $ 60,485