Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 69,988	$ 93,699
Accounts receivable (net of allowance of $1,850 and $2,628, respectively)	662,372	653,484
Receivable from affiliates	187	1,691
Inventories	49,232	101,665
Current assets held for sale	0	38,063
Other current assets	19,320	14,297
Total current assets	801,099	902,899
Property, plant and equipment (net of accumulated depreciation of $570,720 and $444,842, respectively)	3,450,756	3,315,131
Equity method investments	277,021	285,281
Goodwill	257,302	257,302
Other intangible assets (net of accumulated amortization of $81,613 and $56,409, respectively)	373,439	398,643
Other noncurrent assets	138,158	132,600
Noncurrent assets held for sale	0	84,961
Total assets	5,297,775	5,376,817
Current liabilities:
Accounts payable	545,035	587,898
Payable to affiliates	1,294	6,971
Accrued liabilities	111,455	131,407
Deferred revenue	10,211	7,518
Current liabilities held for sale	0	23,847
Other current liabilities	7,880	3,395
Long-term debt, net	6,000	5,525
Total current liabilities	681,875	766,561
Long-term debt, net	2,619,486	2,853,095
Deferred income taxes	52,897	46,585
Other noncurrent liabilities	34,209	38,495
Noncurrent liabilities held for sale	0	13,716
Commitments and contingencies (Note 7)
Preferred stock, $0.01 par value, $361,043 liquidation preference (authorized - 4,000 shares; issued - 350 and 0 shares, respectively)	353,323	0
SemGroup owners’ equity:
Common stock, $0.01 par value (authorized - 190,000 and 100,000 shares; issued - 79,171 and 79,708 shares, respectively)	786	786
Additional paid-in capital	1,656,518	1,770,117
Treasury stock, at cost (106 and 1,024 shares, respectively)	(699)	(8,031)
Accumulated deficit	(74,522)	(50,706)
Accumulated other comprehensive loss	(26,098)	(53,801)
Total owners’ equity	1,555,985	1,658,365
Total liabilities, preferred stock and owners’ equity	$ 5,297,775	$ 5,376,817