Details Of Certain Accounts - Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Note receivable	$ 10,000	$ 10,000
Prepaid insurance	4,492	4,426
Other prepaids	8,829	9,547
Deferred costs	13,466	7,971
Spare parts inventory	2,482	2,548
Income tax receivable	2,005	880
Value added tax receivable	957	1,345
Other	1,208	671
Total other current assets	$ 43,439	$ 37,388
Current note receivable, interest rate (as a percent)	6.00%