Acquisition - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended
	Dec. 31, 2011 La Barge	Jun. 28, 2011 La Barge	Apr. 02, 2011 Foam Matrix
Business Acquisition [Line Items]
Business acquired, net of cash acquired and excluding acquisition costs		$ 325.3
Acquisition funded of debt	390.0
Acquisition expenses	16.1
Unamortized financing cost write off	0.8
Assets acquired			$ 0.4