Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 343,560	$ 86,655
Accounts receivable (net of allowance of $2,292 and $2,244, respectively)	780,956	562,214
Receivable from affiliates	534	295
Inventories	77,120	49,397
Other current assets	18,711	17,264
Total current assets	1,220,881	715,825
Property, plant and equipment (net of accumulated depreciation of $648,434 and $607,903, respectively)	3,845,508	3,457,326
Equity method investments	276,893	274,009
Goodwill	334,893	257,302
Other intangible assets (net of accumulated amortization of $101,914 and $90,014, respectively)	466,934	365,038
Other noncurrent assets	134,847	140,807
Right-of-Use Asset, Operating and Finance Leases	94,082	0
Total assets	6,374,038	5,210,307
Current liabilities:
Accounts payable	750,635	494,792
Payable to affiliates	1,042	3,715
Accrued liabilities	100,941	115,095
Deferred revenue	3,104	11,060
Other current liabilities	18,921	6,495
Long-term debt	6,000	6,000
Total current liabilities	880,643	637,157
Long-term debt	2,461,583	2,278,834
Deferred income taxes	142,461	55,789
Other noncurrent liabilities	142,538	38,548
Commitments and contingencies (Note 8)
Redeemable preferred stock, $0.01 par value, $373,790 liquidation preference (authorized - 4,000 shares; issued - 350 shares)	366,087	359,658
Subsidiary Preferred Stock, Value Outstanding	250,239	0
SemGroup owners’ equity:
Common stock, $0.01 par value (authorized - 190,000 shares; issued - 79,705 and 79,270 shares, respectively)	790	786
Additional paid-in capital	1,496,633	1,615,969
Treasury stock, at cost (173 and 126 shares, respectively)	(1,385)	(705)
Accumulated deficit	(69,764)	(73,971)
Accumulated other comprehensive loss	(71,060)	(51,247)
Total SemGroup Corporation owners’ equity	1,355,214	1,490,832
Stockholders' Equity Attributable to Noncontrolling Interest	775,273	349,489
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,130,487	1,840,321
Total liabilities, preferred stock and owners’ equity	$ 6,374,038	$ 5,210,307