Business Combinations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Customer Relationships	Dec. 31, 2012 Product Technology	Dec. 31, 2012 Other Amortizing Intangible Assets	Dec. 15, 2011 Robuschi spA
Business Acquisition [Line Items]
Total consideration				$ 200.8
Payments to shareholders				151.5
Retirement of external debt at closing				49.3
Long-term debt assumed, approximately				$ 5.2
Weighted-average amortization period, years	18 years	17 years	2 years 7 months 6 days