Business Segment Information - Schedule of Segment Related Capital Expenditure, Depreciation and Amortization on those Expenditures (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Related Capital Expenditure And Depreciation And Amortization On Those Expenditures [Line Items]
Total capital expenditures	$ 35.6	$ 31.5	$ 21.9
Total depreciation and amortization	55.5	48.4	39.6
Sealing Products [Member]
Segment Related Capital Expenditure And Depreciation And Amortization On Those Expenditures [Line Items]
Total capital expenditures	9.7	10.9	8.4
Total depreciation and amortization	30.3	22.9	16.7
Engineered Products [Member]
Segment Related Capital Expenditure And Depreciation And Amortization On Those Expenditures [Line Items]
Total capital expenditures	20.9	11.9	7.4
Total depreciation and amortization	21.8	21.5	18.4
Engine Products And Services [Member]
Segment Related Capital Expenditure And Depreciation And Amortization On Those Expenditures [Line Items]
Total capital expenditures	4.9	8.4	5.9
Total depreciation and amortization	3.1	3.6	3.9
Corporate [Member]
Segment Related Capital Expenditure And Depreciation And Amortization On Those Expenditures [Line Items]
Total capital expenditures	0.1	0.3	0.2
Total depreciation and amortization	$ 0.3	$ 0.4	$ 0.6