Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 252,927	$ 86,655
Accounts receivable (net of allowance of $2,536 and $2,244, respectively)	690,705	562,214
Receivable from affiliates	1,182	295
Inventories	63,539	49,397
Disposal Group, Including Discontinued Operation, Assets, Current	1,025	0
Other current assets	33,984	17,264
Total current assets	1,043,362	715,825
Property, plant and equipment (net of accumulated depreciation of $692,081 and $607,903, respectively)	3,886,438	3,457,326
Equity method investments	284,186	274,009
Goodwill	338,931	257,302
Other intangible assets (net of accumulated amortization of $114,775 and $90,014, respectively)	455,858	365,038
Other noncurrent assets	150,539	140,807
Right-of-Use Asset, Operating and Finance Leases	93,089	0
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	5,537	0
Total assets	6,257,940	5,210,307
Current liabilities:
Accounts payable	580,254	494,792
Payable to affiliates	3,242	3,715
Accrued liabilities	104,830	115,095
Deferred revenue	3,235	11,060
Disposal Group, Including Discontinued Operation, Liabilities, Current	1,935	0
Other current liabilities	14,466	6,495
Long-term debt	12,682	6,000
Total current liabilities	720,644	637,157
Long-term debt	2,510,897	2,278,834
Deferred income taxes	137,846	55,789
Other noncurrent liabilities	145,703	38,548
Commitments and contingencies (Note 8)
Redeemable preferred stock, $0.01 par value, $380,331 liquidation preference (authorized - 4,000 shares; issued - 350 shares)	372,628	359,658
Subsidiary Preferred Stock, Value Outstanding	252,876	0
SemGroup owners’ equity:
Common stock, $0.01 par value (authorized - 190,000 shares; issued - 79,853 and 79,270 shares, respectively)	790	786
Additional paid-in capital	1,453,679	1,615,969
Treasury stock, at cost (271 and 126 shares, respectively)	(1,421)	(705)
Accumulated deficit	(95,351)	(73,971)
Accumulated other comprehensive loss	(51,691)	(51,247)
Total SemGroup Corporation owners’ equity	1,306,006	1,490,832
Stockholders' Equity Attributable to Noncontrolling Interest	811,340	349,489
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,117,346	1,840,321
Total liabilities, preferred stock and owners’ equity	$ 6,257,940	$ 5,210,307