Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 86,655	$ 93,699
Accounts receivable (net of allowance of $2,244 and $2,628, respectively)	562,214	653,484
Receivable from affiliates	295	1,691
Inventories	49,397	101,665
Current assets held for sale	0	38,063
Other current assets	17,264	14,297
Total current assets	715,825	902,899
Property, plant and equipment (net of accumulated depreciation of $607,903 and $444,842, respectively)	3,457,326	3,315,131
Equity method investments	274,009	285,281
Goodwill	257,302	257,302
Other intangible assets (net of accumulated amortization of $90,014 and $56,409, respectively)	365,038	398,643
Other noncurrent assets, net	140,807	132,600
Noncurrent assets held for sale	0	84,961
Total assets	5,210,307	5,376,817
Current liabilities:
Accounts payable	494,792	587,898
Payable to affiliates	3,715	6,971
Accrued liabilities	115,095	131,407
Deferred revenue	11,060	7,518
Current liabilities held for sale	0	23,847
Other current liabilities	6,495	3,395
Current portion of long-term debt	6,000	5,525
Total current liabilities	637,157	766,561
Long-term debt	2,278,834	2,853,095
Deferred income taxes	55,789	46,585
Other noncurrent liabilities	38,548	38,495
Noncurrent liabilities held for sale	0	13,716
Commitments and contingencies (Note 14)
Redeemable preferred stock, $0.01 par value, $367,360 liquidation preference (authorized - 4,000 shares; issued - 350 and 0 shares, respectively)	359,658	0
SemGroup Corporation owners’ equity:
Common stock, $0.01 par value (authorized - 190,000 shares and 100,000 shares, respectively; issued - 79,270 and 79,708 shares, respectively)	786	786
Additional paid-in capital	1,615,969	1,770,117
Treasury stock, at cost (126 and 1,024 shares, respectively)	705	8,031
Accumulated deficit	(73,971)	(50,706)
Accumulated other comprehensive loss	(51,247)	(53,801)
Total SemGroup Corporation owners’ equity	1,490,832	1,658,365
Stockholders' Equity Attributable to Noncontrolling Interest	349,489	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,840,321	1,658,365
Total liabilities and owners’ equity	$ 5,210,307	$ 5,376,817