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Acquisitions - Additional Information (Detail) (Granville-Phillips [Member], USD $)
In Thousands, unless otherwise specified
0 Months Ended 12 Months Ended
May 30, 2014
Dec. 31, 2013
May 30, 2014
Granville-Phillips [Member]
     
Business Acquisition [Line Items]      
Business combination consideration price, cash $ 86,950    
Business combination contingent consideration     50
Business combination consideration price 87,000    
Market sales of an acquiree   $ 30,000