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Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2014
Granville-Phillips [Member]
May 30, 2014
Granville-Phillips [Member]
Mar. 31, 2014
Alter S.r.l [Member]
Goodwill [Line Items]            
Goodwill $ 193,050 $ 150,909 $ 150,733 $ 41,412 $ 41,412  
Acquisition purchase price           $ 381