Goodwill and Other Intangible Assets Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 430,766		$ 421,563
Total other intangible assets, net	353,850		$ 371,416
Amortization expense of intangible assets	6,344	$ 3,747
Estimated Future Amortization Expense by Fiscal Year [Abstract]
Remainder of 2016	7,400
2017	27,900
2018	26,300
2019	21,200
2020	18,800
2021	17,600
After 2021	$ 2,100