Annual report pursuant to Section 13 and 15(d)

Acquisition and Integration Expenses - Additional Information (Detail)

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Acquisition and Integration Expenses - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 5 Months Ended 7 Months Ended 12 Months Ended
Dec. 31, 2010
May 28, 2010
Predecessor [Member]
Dec. 31, 2010
Successor [Member]
Dec. 31, 2012
Successor [Member]
Dec. 31, 2011
Successor [Member]
Business Combination, Separately Recognized Transactions [Line Items]          
Acquisition expenses $ 22,492 $ 11,342 $ 11,150 $ 3,031 $ 2,805