Details Of Certain Accounts - Other Current Assets (Details) - USD ($) $ in Thousands	1 Months Ended
	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Note receivable		$ 0	$ 10,000
Prepaid insurance		2,432	4,426
Other prepaids		10,021	9,547
Deferred costs		20,704	7,971
Spare parts inventory		1,598	2,548
Income tax receivable		0	880
Value added tax receivable		2,169	1,345
Other		1,248	671
Total other current assets		$ 38,172	$ 37,388
Current note receivable, interest rate (as a percent)			6.00%
Proceeds from collection of note receivable	$ 10,000