Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 285,498	$ 93,699
Accounts receivable (net of allowance of $1,788 and $2,628, respectively)	535,705	653,484
Receivable from affiliates	937	1,691
Inventories	81,542	101,665
Current assets held for sale	2,501	38,063
Other current assets	17,341	14,297
Total current assets	923,524	902,899
Property, plant and equipment (net of accumulated depreciation of $483,904 and $444,842, respectively)	3,380,574	3,315,131
Equity method investments	279,054	285,281
Goodwill	257,302	257,302
Other intangible assets (net of accumulated amortization of $64,810 and $56,409, respectively)	390,242	398,643
Other noncurrent assets	142,845	132,600
Noncurrent assets held for sale	65,784	84,961
Total assets	5,439,325	5,376,817
Current liabilities:
Accounts payable	492,507	587,898
Payable to affiliates	2,321	6,971
Accrued liabilities	100,373	131,407
Deferred revenue	8,312	7,518
Current liabilities held for sale	2,434	23,847
Other current liabilities	19,184	3,395
Long-term debt, net	5,527	5,525
Total current liabilities	630,658	766,561
Long-term debt, net	2,733,957	2,853,095
Deferred income taxes	60,551	46,585
Other noncurrent liabilities	37,384	38,495
Noncurrent liabilities held for sale	14,258	13,716
Commitments and contingencies (Note 7)
Preferred stock, $0.01 par value, $350,000 liquidation preference (authorized - 4,000 shares; issued - 350 and 0 shares, respectively)	342,354	0
SemGroup owners’ equity:
Common stock, $0.01 par value (authorized - 100,000 shares; issued - 79,062 and 79,708 shares, respectively)	785	786
Additional paid-in capital	1,735,646	1,770,117
Treasury stock, at cost (35 and 1,024 shares, respectively)	(381)	(8,031)
Accumulated deficit	(80,257)	(50,706)
Accumulated other comprehensive loss	(35,630)	(53,801)
Total owners’ equity	1,620,163	1,658,365
Total liabilities, preferred stock and owners’ equity	$ 5,439,325	$ 5,376,817