Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
General Partner Expense [Member]
Related Party Transactions (Textual)
Costs and Expenses, Related Party	$ 139,797	$ 90,741
UGI Corp Expense Reimbursement [Member]
Related Party Transactions (Textual)
Costs and Expenses, Related Party	3,892	2,267
UGI Corp Office Insurance Reimbursement [Member]
Related Party Transactions (Textual)
Costs and Expenses, Related Party	1,564	902
Energy Services Propane Purchases [Member]
Related Party Transactions (Textual)
Costs and Expenses, Related Party	$ 0	$ 0