Goodwill and Other Intangible Assets Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 658,400		$ 659,900
Total other intangible assets, net	820,000		$ 830,300
Amortization expense of intangible assets	(10,000)	$ (10,200)
Estimated Future Amortization Expense by Fiscal Year [Abstract]
Remainder of 2016	26,100
2017	33,300
2018	28,300
2019	25,800
2020	25,000
2021	25,000
After 2021	$ 214,600