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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 12, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |  |
Business acquisition cash paid | $ 205,100 |  |  |  |  |
Additional borrowing |  |  |  | $ 65,000 | $ 50,000 |
Acquisition related transaction expenses |  |  |  |  |  | $ 2,700
Operating Income (loss) |  | $ 23,664 | $ 26,741 | 30,089 | $ 27,032 |
Revolving Credit Facility [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Additional borrowing | 60,500 |  |  |  |  |
Term Credit Facility [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Additional borrowing | $ 150,000 |  |  |  |  |
Retail Decisions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Revenue |  | 9,800 |  | 20,100 |  |
Operating Income (loss) |  | $ (2,100) |  | $ (3,800) |  |

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