Details Of Certain Accounts - Other Current Assets (Details) - USD ($) $ in Thousands	1 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Note receivable	$ 0	$ 10,000
Prepaid insurance	3,603	4,426
Other prepaids	9,934	9,547
Deferred costs	17,992	7,971
Spare parts inventory	2,539	2,548
Income tax receivable	2,559	880
Value added tax receivable	2,741	1,345
Other	838	671
Total other current assets	$ 40,206	$ 37,388
Current note receivable, interest rate (as a percent)	6.00%
Proceeds from collection of note receivable	$ 10,000