Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization of other intangible assets	$ 2,590	$ 3,007	$ 5,196	$ 6,019
Estimated amortization expense during the remainder of 2016	5,100		5,100
Estimated amortization expense for the year 2017	9,400		9,400
Estimated amortization expense for the year 2018	7,900		7,900
Estimated amortization expense for the year 2019	7,200		7,200
Estimated amortization expense for the year 2020	7,100		7,100
Estimated amortization expense for the year 2021	6,600		6,600
Estimated amortization expense after the year 2021	$ 8,700		$ 8,700