Commitments and Contingencies (Details)	3 Months Ended
	Dec. 31, 2012 lb
CA cylinder investigation [Member]
Loss Contingencies [Line Items]
Amount of propane in cylinders before reduction (in pounds)	17
Amount of propane in cylinders after reduction (in pounds)	15
FTC Investigation [Member]
Loss Contingencies [Line Items]
Amount of propane in cylinders before reduction (in pounds)	17
Amount of propane in cylinders after reduction (in pounds)	15
BP Matter [Member]
Loss Contingencies [Line Items]
Number of residential customers related to the installation propane - fueled equipment and appliances, and the supply of propane (in customers)	400