Discontinued Operations (Narrative) (Detail) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended		0 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Jun. 19, 2012 Azonix [Member]	Mar. 31, 2013 Azonix [Member]	Dec. 31, 2012 Azonix [Member]	Jun. 28, 2012 Fluid Handling
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal of discontinued operation, net of tax			$ 44,800,000			$ 9,300,000
Disposal of discontinued operation, tax benefit	$ 0	$ 0	$ 14,500,000	$ 900,000	$ 500,000	$ 4,600,000