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
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Business Combinations [Abstract]      
Acquisition expenses $ 8,638 $ 3,031 $ 2,805