Goodwill and Intangible Assets (Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 466,520	$ 414,254
Intangible assets - Gross Carrying Amount	528,620	476,354
Amortized intangible assets - Accumulated Amortization	(227,698)	(205,190)
Amortized intangible assets - Net	238,822	209,064
Intangible assets - Net	300,922	271,164
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,117	10,016
Amortized intangible assets - Accumulated Amortization	(5,941)	(5,313)
Amortized intangible assets - Net	$ 4,176	4,703
Amortized intangible assets - Weighted Average Life	11 years
Trade names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 111,537	104,118
Amortized intangible assets - Accumulated Amortization	(37,168)	(32,881)
Amortized intangible assets - Net	$ 74,369	71,237
Amortized intangible assets - Weighted Average Life	16 years
Customer relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 258,883	222,486
Amortized intangible assets - Accumulated Amortization	(138,145)	(126,193)
Amortized intangible assets - Net	$ 120,738	96,293
Amortized intangible assets - Weighted Average Life	11 years
Non-compete agreements
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 813	840
Amortized intangible assets - Accumulated Amortization	(775)	(636)
Amortized intangible assets - Net	$ 38	204
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 78,613	69,760
Amortized intangible assets - Accumulated Amortization	(40,249)	(35,165)
Amortized intangible assets - Net	$ 38,364	34,595
Amortized intangible assets - Weighted Average Life	10 years
Other
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 6,557	7,034
Amortized intangible assets - Accumulated Amortization	(5,420)	(5,002)
Amortized intangible assets - Net	$ 1,137	2,032
Amortized intangible assets - Weighted Average Life	10 years
Banjo trade name
Goodwill And Intangible Assets [Line Items]
Indefinite lived intangible assets - Gross Carrying Amount	$ 62,100	62,100
Indefinite lived intangible assets - Net	$ 62,100	$ 62,100