Goodwill and Intangible Assets (Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	$ 454,577	$ 444,184
Intangible assets - Gross Carrying Amount	516,677	506,284
Amortized intangible assets - Accumulated Amortization	(216,402)	(195,057)
Amortized intangible assets - Net	238,175	249,127
Intangible assets - Net	300,275	311,227
Patents
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	10,016	10,673
Amortized intangible assets - Accumulated Amortization	(4,888)	(5,179)
Amortized intangible assets - Net	5,128	5,494
Amortized intangible assets - Weighted Average Life	11 years
Trade names
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	108,215	104,582
Amortized intangible assets - Accumulated Amortization	(31,696)	(28,310)
Amortized intangible assets - Net	76,519	76,272
Amortized intangible assets - Weighted Average Life	16 years
Customer relationships
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	248,676	242,674
Amortized intangible assets - Accumulated Amortization	(135,162)	(121,092)
Amortized intangible assets - Net	113,514	121,582
Amortized intangible assets - Weighted Average Life	10 years
Non-compete agreements
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	3,073	3,769
Amortized intangible assets - Accumulated Amortization	(2,705)	(3,272)
Amortized intangible assets - Net	368	497
Amortized intangible assets - Weighted Average Life	3 years
Unpatented technology
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	77,565	75,528
Amortized intangible assets - Accumulated Amortization	(37,297)	(32,905)
Amortized intangible assets - Net	40,268	42,623
Amortized intangible assets - Weighted Average Life	11 years
Other
Goodwill And Intangible Assets [Line Items]
Amortized intangible assets - Gross Carrying Amount	7,032	6,958
Amortized intangible assets - Accumulated Amortization	(4,654)	(4,299)
Amortized intangible assets - Net	2,378	2,659
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