Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 28,731	$ 17,063
Trade accounts receivable	83,893	84,465
Other accounts receivable	12,701	15,711
Inventory	130,868	157,762
Energy commodity derivatives contracts, net	39,243	87,151
Energy commodity derivatives deposits	0	6,184
Other current assets	43,418	34,331
Total current assets	338,854	402,667
Property, plant and equipment	6,166,766	5,533,935
Less: accumulated depreciation	1,347,537	1,204,601
Net property, plant and equipment	4,819,229	4,329,334
Investments in non-controlled entities	765,628	613,867
Long-term receivables	20,374	28,611
Goodwill	53,260	53,260
Other intangibles (less accumulated amortization of $11,526 and $13,709 at December 31, 2014 and 2015, respectively)	1,856	4,573
Tank bottoms	27,533	42,585
Other noncurrent assets	14,833	26,512
Total assets	6,041,567	5,501,409
Current liabilities:
Accounts payable	104,094	97,131
Accrued payroll and benefits	51,764	48,298
Accrued interest payable	51,296	45,973
Accrued taxes other than income	51,587	47,888
Environmental liabilities	15,679	10,564
Deferred revenue	81,627	71,142
Accrued product purchases	31,339	44,355
Energy commodity derivatives contracts, net	0	5,413
Energy commodity derivatives deposits	24,252	84,463
Current portion of long-term debt	250,335	0
Other current liabilities	51,099	80,928
Total current liabilities	713,072	536,155
Long-term debt	3,189,287	2,967,019
Long-term pension and benefits	77,551	75,155
Other noncurrent liabilities	24,162	29,069
Environmental liabilities	$ 15,759	$ 25,778
Commitments and contingencies
Partners' capital:
Limited partner unitholders (227,068 units and 227,427 units outstanding at December 31, 2014 and 2015, respectively)	$ 2,118,086	$ 1,949,773
Accumulated other comprehensive loss	(96,350)	(81,540)
Total partners’ capital	2,021,736	1,868,233
Total liabilities and partners' capital	$ 6,041,567	$ 5,501,409

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.