Goodwill and Intangible Assets (Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset) (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 470,045	$ 414,254
Intangible assets - Gross Carrying Amount	532,145	476,354
Amortized intangible assets - Accumulated Amortization	(218,451)	(205,190)
Amortized intangible assets - Net	251,594	209,064
Intangible assets - Net	313,694	271,164
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,168	10,016
Amortized intangible assets - Accumulated Amortization	(5,768)	(5,313)
Amortized intangible assets - Net	$ 4,400	4,703
Amortized intangible assets - Weighted Average Life	11 years
Trade names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 107,506	104,118
Amortized intangible assets - Accumulated Amortization	(35,754)	(32,881)
Amortized intangible assets - Net	$ 71,752	71,237
Amortized intangible assets - Weighted Average Life	16 years
Customer relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 265,256	222,486
Amortized intangible assets - Accumulated Amortization	(132,125)	(126,193)
Amortized intangible assets - Net	$ 133,131	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	$ 836	840
Amortized intangible assets - Accumulated Amortization	(762)	(636)
Amortized intangible assets - Net	$ 74	204
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 79,243	69,760
Amortized intangible assets - Accumulated Amortization	(38,682)	(35,165)
Amortized intangible assets - Net	$ 40,561	34,595
Amortized intangible assets - Weighted Average Life	10 years
Other
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 7,036	7,034
Amortized intangible assets - Accumulated Amortization	(5,360)	(5,002)
Amortized intangible assets - Net	$ 1,676	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