CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 24,292	$ 35,942
Accounts receivable, net of allowance for doubtful accounts of $9,948 and $7,756 as of December 31, 2017 and 2016, respectively	176,570	170,293
Receivable from related party	205	317
Inventories	26,857	37,945
Other current assets	22,508	132,686
Total current assets	250,432	377,183
Property, plant and equipment, at cost	6,243,481	5,435,278
Accumulated depreciation and amortization	(1,942,548)	(1,712,995)
Property, plant and equipment, net	4,300,933	3,722,283
Intangible assets, net	784,479	127,083
Goodwill	1,097,475	696,637
Deferred income tax asset	233	2,051
Other long-term assets, net	101,681	105,308
Total assets	6,535,233	5,030,545
Current liabilities:
Accounts payable	145,932	118,686
Short-term debt	35,000	54,000
Current portion of long-term debt	349,990	0
Accrued interest payable	40,449	34,030
Accrued liabilities	61,578	60,485
Taxes other than income tax	14,385	15,685
Income tax payable	4,172	6,510
Total current liabilities	651,506	289,396
Long-term debt, less current portion	3,263,069	3,014,364
Deferred income tax liability	22,272	22,204
Other long-term liabilities	118,297	92,964
Commitments and contingencies (Note 14)
Partners' equity (Note 19):
Preferred limited partners	756,603	218,400
Common limited partners (93,176,683 and 78,616,228 common units outstanding as of December 31, 2017 and 2016, respectively)	1,770,587	1,455,642
General partner	37,826	31,752
Accumulated other comprehensive loss	(84,927)	(94,177)
Total partners' equity	2,480,089	1,611,617
Total liabilities and partners' equity	$ 6,535,233	$ 5,030,545

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.