Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating Activities:
Net income	$ 193,064	$ 166,986
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	60,027	52,057
Debt placement fee amortization	770	657
Loss (gain) on sale, retirement and impairment of assets	7,106	(1,281)
Equity earnings	(2,810)	(2,669)
Distributions from equity investments	2,710	1,870
Equity-based incentive compensation expense	9,017	6,909
Amortization of prior service credit and actuarial loss	155	(21)
Changes in operating assets and liabilities:
Restricted cash	14,379
Trade accounts receivable and other accounts receivable	9,830	9,320
Inventory	(69,588)	(15,799)
Energy commodity derivatives contracts, net of derivatives deposits	(14,159)	(2,525)
Reimbursable costs	5,925	2,585
Accounts payable	7,001	5,381
Accrued payroll and benefits	(7,220)	(7,898)
Accrued interest payable	372	(2,016)
Accrued taxes other than income	(3,412)	(1,348)
Accrued product purchases	(1,063)	2,799
Contingent liabilities	14,025	184
Tank bottom inventory	(6,041)
Current and noncurrent environmental liabilities	6,866	(3,898)
Other current and noncurrent assets and liabilities	(8,899)	2,009
Net cash provided by operating activities	218,055	213,302
Investing Activities:
Additions to property, plant and equipment	(95,273)	(97,883)
Proceeds from sale and disposition of assets	753	5,128
Increase in accounts payable related to capital expenditures	532	3,888
Acquisition of assets	(17,798)	(29,300)
Acquisition of non-controlling owners' interests	(40,500)
Other	(4,600)
Net cash used by investing activities	(156,886)	(118,167)
Financing Activities:
Distributions paid	(172,205)	(152,626)
Net borrowings under revolver	135,000	83,400
Net receipt from financial derivatives		9,565
Decrease in outstanding checks	(11,045)	(1,672)
Settlement of tax withholdings on long-term incentive compensation	(7,410)	(3,371)
Capital contributed by non-controlling owners		851
Other		(356)
Net cash used by financing activities	(55,660)	(64,209)
Change in cash and cash equivalents	5,509	30,926
Cash and cash equivalents at beginning of period	7,483	4,168
Cash and cash equivalents at end of period	12,992	35,094
Supplemental non-cash financing activity:
Issuance of limited partner units in settlement of equity-based incentive plan awards	4,315	2,034
Non-cash capital contributed by non-controlling owners		$ 10,299