Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Derivative Financial Instruments

Derivative Gains (Losses) Included in Accumulated Other Comprehensive Loss ("AOCL")

	Three Months Ended June 30,						Six Months Ended June 30,
Derivative Activity Included in AOCL	2010			2011			2010			2011
Beginning balance	$	3,448		$	3,284		$	1,743		$	3,325
Net gain (loss) on commodity hedges	—			4,613			(289		)	4,613
Reclassification of net gain on cash flow hedges to interest expense	(41		)	(41		)	(82		)	(82		)
Reclassification of net loss on commodity hedges to product sales revenues	—			—			2,035			—
Ending balance	$	3,407		$	7,856		$	3,407		$	7,856

Derivatives and Hedging-Fair Value Hedges

Derivative  Instrument	Location of Gain Recognized on Derivative	Amount of Gain Recognized on Derivative								Amount of Interest Expense Recognized on Fixed-Rate Debt (Related Hedged Item)
		Three Months Ended				Six Months Ended				Three Months Ended						Six Months Ended
		June 30, 2010		June 30, 2011		June 30, 2010		June 30, 2011		June 30, 2010			June 30, 2011			June 30, 2010			June 30, 2011
Interest rate swap agreements	Interest expense	$	1,588	$	808	$	4,604	$	1,011	$	(8,636	)	$	(4,001	)	$	(17,277	)	$	(6,223	)

Derivatives and Hedging-Cash Flow Hedge

	Three Months Ended June 30, 2010 Effective Portion
Derivative Instrument	Amount of  Gain Recognized in AOCL on Derivative			Location of Gain  Reclassified from AOCL into Income	Amount of Gain Reclassified from AOCL into Income
Interest rate swap agreements		$	—	Interest expense		$	41
	Three Months Ended June 30, 2011 Effective Portion
Derivative Instrument	Amount of Gain Recognized in AOCL on Derivative			Location of Gain Reclassified from AOCL into Income	Amount of Gain Reclassified from AOCL into Income
Interest rate swap agreements		$	—	Interest expense		$	41
NYMEX commodity contracts		4,613		Product sales revenues		—
Total cash flow hedges		$	4,613	Total		$	41

	Six Months Ended June 30, 2010 Effective Portion
Derivative Instrument	Amount of  Gain (Loss) Recognized in AOCL on Derivative				Location of Gain (Loss)  Reclassified from AOCL into Income	Amount of Gain (Loss) Reclassified from AOCL into Income
Interest rate swap agreements		$	—		Interest expense		$	82
NYMEX commodity contracts		(289		)	Product sales revenues		(2,035		)
Total cash flow hedges		$	(289	)	Total		$	(1,953	)
	Six Months Ended June 30, 2011 Effective Portion
Derivative Instrument	Amount of Gain Recognized in AOCL on Derivative				Location of Gain Reclassified from AOCL into Income	Amount of Gain Reclassified from AOCL into Income
Interest rate swap agreements		$	—		Interest expense		$	82
NYMEX commodity contracts		4,613			Product sales revenues		—
Total cash flow hedges		$	4,613		Total		$	82

Derivatives and Hedging-Overall-Subsequent Measurement

		Amount of Gain (Loss) Recognized on Derivative
		Three Months  Ended June 30,					Six Months Ended June 30,
Derivative Instrument	Location of Gain (Loss) Recognized on Derivative	2010		2011			2010		2011
NYMEX commodity contracts	Product sales revenues	$	23,766	$	2,150		$	16,832	$	(36,183	)
Butane price swap purchase contracts	Product purchases	—		(839		)	—		(839		)
	Total	$	23,766	$	1,311		$	16,832	$	(37,022	)

Derivatives and Hedging-Designated

	December 31, 2010
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
NYMEX commodity contracts	Other noncurrent assets	$	—	Other noncurrent liabilities	$	4,920
	June 30, 2011
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Interest rate swap agreement, current portion	Other current assets	$	2,678	Other current liabilities	$	—
Interest rate swap agreement, noncurrent portion	Other noncurrent assets	1,849		Other noncurrent liabilities	—
NYMEX commodity contracts	Energy commodity derivatives contracts	2,209		Energy commodity derivatives contracts	107
NYMEX commodity contracts	Other noncurrent assets	—		Other noncurrent liabilities	10,962
	Total	$	6,736	Total	$	11,069

Derivatives and Hedging-Nondesignated

	December 31, 2010
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
NYMEX commodity contracts	Energy commodity derivatives contracts	$	—	Energy commodity derivatives contracts	$	11,790
	June 30, 2011
	Asset Derivatives			Liability Derivatives
Derivative Instrument	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
NYMEX commodity contracts	Energy commodity derivatives contracts	$	5,191	Energy commodity derivatives contracts	$	14,634
Butane price swap purchase contracts	Energy commodity derivatives contracts	—		Energy commodity derivatives contracts	839
		$	5,191		$	15,473