Goodwill and Other Intangible Assets, Net - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total gross definite life intangible assets	$ 280,953	$ 192,523
Accumulated Amortization	57,686	42,686
Net definite life intangible assets	$ 223,267	$ 149,837
Weighted-Average Remaining Life	12 years 4 months 24 days	14 years 4 months 24 days
Total indefinite life intangible assets	$ 92,782	$ 97,886
Total definite and indefinite life intangible assets, gross, excluding goodwill	373,735	290,409
Total definite and indefinite life intangible assets, net, excluding goodwill	316,049	247,723
Trade Names [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total indefinite life intangible assets	90,293	96,386
Licenses [Member]
Schedule Of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Total indefinite life intangible assets	2,489	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	196,299	127,749
Accumulated Amortization	20,751	14,386
Net definite life intangible assets	$ 175,548	$ 113,363
Weighted-Average Remaining Life	14 years 6 months	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	$ 24,023	$ 24,570
Accumulated Amortization	8,005	6,275
Net definite life intangible assets	$ 16,018	$ 18,295
Weighted-Average Remaining Life	4 years 8 months 12 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	$ 31,045	$ 16,478
Accumulated Amortization	11,557	7,597
Net definite life intangible assets	$ 19,488	$ 8,881
Weighted-Average Remaining Life	2 years 6 months	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	$ 10,549	$ 10,300
Accumulated Amortization	9,435	8,432
Net definite life intangible assets	$ 1,114	$ 1,868
Weighted-Average Remaining Life	2 years 6 months	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	$ 19,037	$ 13,426
Accumulated Amortization	7,938	5,996
Net definite life intangible assets	$ 11,099	$ 7,430
Weighted-Average Remaining Life	8 years 9 months 18 days	3 years 8 months 12 days