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Principles of Consolidation and Basis of Presentation - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2014 Segment | Sep. 30, 2013
Organization And Basis Of Presentation [Line Items] |  |
Date of incorporation | Mar. 09, 2010 |
State of incorporation | Ireland |
Kind of listing | A ordinary shares |
Number of business segments | 2 |
Amortization and depreciation | $ 2,649 | $ 2,767
Restatement Adjustment |  |
Organization And Basis Of Presentation [Line Items] |  |
Amortization and depreciation | $ 2,200 |

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