Prepaids and Other Current Assets Prepaids and Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Prepaid Expense and Other Assets, Current [Abstract]
Other Receivables	$ 431	$ 21,940
Other Prepaid Expense, Current	13,897	4,208
Prepaid insurance and property taxes	2,045	2,580
Prepaid Taxes	5,577	8,097
Deferred tax charge	1,912	1,326
Other Assets, Current	4,880	3,135
Prepaid expenses and other current assets	$ 28,742	$ 41,286	[1]

[1] December 31, 2017 balances were derived from audited consolidated financial statements.