Discontinued Operations (Narrative) (Detail) (USD $)	3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Jun. 19, 2012 Azonix [Member]	Sep. 30, 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					$ 43,400,000		$ 9,300,000
Disposal of discontinued operation, tax benefit	$ 901,000	$ 0	$ 19,177,000	$ 0	$ 14,500,000	$ 900,000	$ 4,600,000