Goodwill and Intangible Assets (Weighted Average Amortization Period by Intangible Asset Class) (Detail)	Dec. 31, 2012 Year
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	7.6
Trademarks and patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	6.3
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	9.3
Covenant not-to-compete [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	3.9
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period	9.4