Goodwill and Other Intangible Assets, Net - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 286,236	$ 192,523
Accumulated Amortization	48,933	42,686
Net definite life intangible assets	$ 237,303	$ 149,837
Weighted-Average Remaining Life	12 years 7 months 6 days	14 years 4 months 24 days
Total indefinite life intangible assets	$ 91,792	$ 97,886
Total definite and indefinite life intangible assets, gross, excluding goodwill	378,028	290,409
Total definite and indefinite life intangible assets, net, excluding goodwill	329,095	247,723
Trade Names [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total indefinite life intangible assets	90,292	96,386
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
Customer-Related Intangible Assets [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	209,110	127,749
Accumulated Amortization	16,973	14,386
Net definite life intangible assets	$ 192,137	$ 113,363
Weighted-Average Remaining Life	14 years 4 months 24 days	17 years 8 months 12 days
Technology [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 24,034	$ 24,570
Accumulated Amortization	7,137	6,275
Net definite life intangible assets	$ 16,897	$ 18,295
Weighted-Average Remaining Life	4 years 10 months 24 days	5 years 2 months 12 days
Noncompete Agreements [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 23,754	$ 16,478
Accumulated Amortization	8,965	7,597
Net definite life intangible assets	$ 14,789	$ 8,881
Weighted-Average Remaining Life	2 years 10 months 24 days	2 years 8 months 12 days
Patents [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 10,424	$ 10,300
Accumulated Amortization	9,074	8,432
Net definite life intangible assets	$ 1,350	$ 1,868
Weighted-Average Remaining Life	2 years 3 months 18 days	1 year 8 months 12 days
All Other [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 18,914	$ 13,426
Accumulated Amortization	6,784	5,996
Net definite life intangible assets	$ 12,130	$ 7,430
Weighted-Average Remaining Life	8 years 8 months 12 days	3 years 8 months 12 days