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Goodwill and Other Intangible Assets Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]        
Goodwill $ 129,580   $ 129,580 $ 123,031
Total other intangible assets, net 105,450   105,450 $ 100,935
Amortization expense of intangible assets 2,913 $ 2,963 5,667  
Estimated Future Amortization Expense by Fiscal Year [Abstract]        
Remainder of 2015 6,200   6,200  
2016 12,400   12,400  
2017 12,000   12,000  
2018 10,500   10,500  
2019 9,300   9,300  
2020 4,400   4,400  
After 2020 $ 2,700   $ 2,700