Related Party Transactions (Narrative) (Details) (USD $)	12 Months Ended						12 Months Ended								3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2012 Affiliated Entity [Member]	Dec. 31, 2011 Affiliated Entity [Member]	Dec. 31, 2012 Annual Administrative Fee [Member] Affiliated Entity [Member]	Dec. 31, 2011 Annual Administrative Fee [Member] Affiliated Entity [Member]	Dec. 31, 2012 Reimbursements Paid [Member] Affiliated Entity [Member]	Dec. 31, 2011 Reimbursements Paid [Member] Affiliated Entity [Member]	Dec. 31, 2010 Reimbursements Paid [Member] Affiliated Entity [Member]	Dec. 31, 2012 Proceeds From Reimbursements Received [Member] Affiliated Entity [Member]	Dec. 31, 2011 Proceeds From Reimbursements Received [Member] Affiliated Entity [Member]	Dec. 31, 2010 Proceeds From Reimbursements Received [Member] Affiliated Entity [Member]	Dec. 31, 2012 Shortfall Payments [Member] Affiliated Entity [Member]	Dec. 31, 2012 Shortfall Payments [Member] Affiliated Entity [Member]	Dec. 31, 2011 Shortfall Payments [Member] Affiliated Entity [Member]	Dec. 31, 2012 Shortfall Payments [Member] UNEV Pipeline [Member]	Dec. 31, 2012 UNEV Pipeline [Member]	Jun. 30, 2012 UNEV Pipeline [Member]	Dec. 31, 2012 Minimum Quarterly Distribution Percentage [Member]
Related Party Transaction [Line Items]
Partners Capital Distribution percentage																					98.00%
Minimum Annualized Payments Receivable	$ 256,700,000				$ 217,200,000	$ 5,500,000
Expenses resulting from agreement with related party							2,300,000
Annual administrative fee, related party							2,300,000	2,300,000
Affiliates	245,582,000	168,261,000		146,367,000											7,800,000	3,600,000	3,300,000
Reimbursements paid to related parties									31,100,000	21,400,000	18,600,000	13,400,000	11,900,000	3,700,000
Distributions to HFC, Including Incentive	64,000,000	40,600,000		35,900,000
Due from Affiliates	31,594,000	31,922,000	[1]		31,600,000	31,900,000
Due to Affiliate, Current	4,985,000	6,474,000	[1]		5,000,000	6,500,000
Deferred revenue, related parties																$ 5,100,000	$ 4,000,000	$ 3,800,000
Equity method investment, ownership percentage																			75.00%	75.00%
General Partners Capital, Distribution Amount per share	2.00%																				200.00%

[1] (1) Restated as described in Note 2.