Goodwill and Other Intangible Assets, Net - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total definite and indefinite life intangible assets, gross, excluding goodwill	$ 279,528	$ 281,674
Total gross definite life intangible assets	187,773	189,919
Accumulated Amortization	51,035	47,707
Total definite and indefinite life intangible assets, net, excluding goodwill	228,493	233,967
Net definite life intangible assets	$ 136,738	$ 142,212
Weighted-Average Remaining Life	14 years	13 years 8 months 12 days
Total indefinite life intangible assets	$ 91,755	$ 91,755
Patents [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	9,658	8,144
Accumulated Amortization	7,643	6,944
Net definite life intangible assets	$ 2,015	$ 1,200
Weighted-Average Remaining Life	2 years 1 month 6 days	2 years 4 months 24 days
Acquired Intangibles [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 174,193	$ 177,858
Accumulated Amortization	41,452	37,996
Net definite life intangible assets	$ 132,741	$ 139,862
Weighted-Average Remaining Life	14 years 3 months 18 days	13 years 10 months 24 days
Noncompete Agreements [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 1,790	$ 1,790
Accumulated Amortization	1,790	1,790
All Other [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	2,132	2,127
Accumulated Amortization	150	977
Net definite life intangible assets	$ 1,982	$ 1,150
Weighted-Average Remaining Life	3 years	3 years 3 months 18 days
Trade Names [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total indefinite life intangible assets	$ 90,255	$ 90,255
Horizon License [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total indefinite life intangible assets	$ 1,500	$ 1,500