Subsequent Events (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010 Lawrence Pumps [Member]	Oct. 31, 2011 Lawrence Pumps [Member]
Subsequent Events (Textual) [Abstract]
Sales revenue of subsidiaries					$ 44,000,000
Segment operating income Subtotal - Reportable Segments	154,957,000	129,196,000	425,315,000	417,399,000	8,000,000
Percentage of outstanding equity acquired						100.00%
Cost of acquired identity in cash						$ 89,000,000