Accounts Receivable, Net - Provisions For Doubtful Accounts (Table) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
ACCOUNTS RECEIVABLE,NET [Abstract]      
Balance at Beginning of Period $ (19,437) $ (18,278) $ (18,464)
Charges to Costs and Expenses (269) (1,304) (59)
Amount Utilized 0 145 245
Balance at End of Period $ (19,706) $ (19,437) $ (18,278)