Correction of Accounting Error	3 Months Ended
Correction of Accounting Error	Mar. 31, 2013
Correction of Accounting Error [Abstract]
Correction of Accounting Error	3. Correction of Accounting Error During the first quarter of 2013, the Company identified an error in the intra-company elimination and purchase price allocation of Quinn's Oilfield Supply Ltd. for the year ended December 31, 2012 in which goodwill was overstated by $9.2 million and accounts receivable and accounts payable were understated by $16.6 million and $7.4 million, respectively. In accordance with Accounting Standards Codification (ASC) Topic 250, Accounting for Changes and Error Corrections, the Company evaluated the materiality of the error from a qualitative and quantitative perspective and concluded that the error was not material to the respective balances at December 31, 2012. Further, the error had no impact on the results of operations or total cash flows from operating activities for the year ended December 31, 2012. Accordingly, the Company corrected the goodwill, accounts receivable, and accounts payable balances in the first quarter of 2013.

The entire disclosure for reporting accounting changes and error corrections. It includes the conveyance of information necessary for a user of the Company's financial information to understand all aspects and required disclosure information concerning all changes and error corrections reported in the Company's financial statements for the period.

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