Details Of Certain Accounts (Other Current Assets) (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
		Jan. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Note receivable	[1]				$ 10,000	$ 17,500
Other receivables					597	423
Prepaid insurance					7,968	6,582
Other prepaids					9,295	15,541
Spare parts inventory					5,022	1,857
Income tax receivable					3,477	0
Value added tax receivable					8,060	9,326
Other					81	72
Total other current assets					$ 44,500	$ 51,301
Note receivable, interest rate					6.00%
Financing receivable, gross					$ 20,000
Note receivable, periodic principal payment		$ 7,500
Scenario, Forecast [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Note receivable, periodic principal payment			$ 10,000	$ 10,000

[1] Relates to the remaining balance of the promissory note we received in connection with the sale of our Ingleside spoolbase in January 2014. The balance at December 31, 2014 included $7.5 million, which was paid in January 2015. Interest on the note is payable quarterly at a rate of 6% per annum. Under the terms of the note, the remaining $20 million principal balance is required to be paid with a $10 million payment on December 31, 2015 and December 31, 2016.