Prepaids and Other Current Assets Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Prepaid Expense and Other Assets, Current [Abstract]
Deposit Assets	$ 1,087	$ 21,940
Other Prepaid Expense, Current	12,476	4,208
Deferred Costs and Other Assets	1,951	1,301
Prepaid insurance and property taxes	2,666	2,580
Prepaid other taxes	5,072	8,097
Deferred tax charge	1,180	1,326
Other Assets, Current	1,548	1,834
Prepaid expenses and other current assets	$ 25,980	$ 41,286