Intangible Asset Depreciation and Amortization Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2010 Minimum	Dec. 31, 2010 Maximum	Dec. 31, 2012 Patents	Dec. 31, 2012 Patents Minimum	Dec. 31, 2012 Patents Maximum	Dec. 31, 2012 Trade Names	Dec. 31, 2012 Trade Names Minimum	Dec. 31, 2012 Trade Names Maximum	Dec. 31, 2012 Customer Relationships	Dec. 31, 2012 Customer Relationships Minimum	Dec. 31, 2012 Customer Relationships Maximum	Dec. 31, 2012 Non-Compete Agreements	Dec. 31, 2012 Non-Compete Agreements Minimum	Dec. 31, 2012 Non-Compete Agreements Maximum	Dec. 31, 2012 Unpatented technology and other	Dec. 31, 2012 Unpatented technology and other Minimum	Dec. 31, 2012 Unpatented technology and other Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible Asset, Useful Life	2 years	15 years	11 years	5 years	17 years	16 years	10 years	20 years	10 years	3 years	20 years	3 years	2 years	5 years	11 years	4 years	20 years