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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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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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