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Basis of Presentation - Schedule of Condensed Consolidated Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2014 | Jun. 30, 2014 | Jun. 30, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net Loss | $ (12,104) | $ (8,912) | $ 15,067
Changes in operating assets and liabilities: |  |  |
Refundable income taxes | (8,187) | (5,260) |
Net cash provided by operating activities | 40,139 | 33,235 | 13,189
As Previously Reported [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net Loss | (9,890) |  |
Changes in operating assets and liabilities: |  |  |
Refundable income taxes | (10,401) |  |
Net cash provided by operating activities | 40,139 |  |
Adjustment [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net Loss | (2,214) |  |
Changes in operating assets and liabilities: |  |  |
Refundable income taxes | 2,214 |  |
Net cash provided by operating activities |  |  |

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