v3.8.0.1
DEFERRED CHARGES AND OTHER ASSETS - Future Amortization Exp (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Amortization Expense For Deferred Charges Other Assets And Definite Lived Assets [Line Items]  
2018 $ 14,960
2019 9,127
2020 7,570
2021 6,413
2022 6,026
Thereafter 7,676
Total amortization expense for deferred charges and other assets 51,772
Other Deferred Assets [Member]  
Amortization Expense For Deferred Charges Other Assets And Definite Lived Assets [Line Items]  
2018 2,104
2019 1,757
2020 1,172
2021 125
2022 114
Thereafter 0
Total amortization expense for deferred charges and other assets 5,272
Finite Lived Assets [Member]  
Amortization Expense For Deferred Charges Other Assets And Definite Lived Assets [Line Items]  
2018 12,856
2019 7,370
2020 6,398
2021 6,288
2022 5,912
Thereafter 7,676
Total amortization expense for deferred charges and other assets $ 46,500