Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Data [Abstract]

Summarized Information on the Consolidated Results of Operations

Summarized information on our consolidated results of operations for the quarters during the year ended December 31, 2016 is shown below (in thousands, except per share amounts):

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter		Total
Total revenues	$	314,851		$	287,377		$	327,764		$	402,172	$	1,332,164
Loss on disposal or impairment, net	13,307			1,685			1,018			38		16,048
Other operating costs and expenses	292,250			277,379			316,644			381,969		1,268,242
Total expenses	305,557			279,064			317,662			382,007		1,284,290
Earnings from equity method investments	23,071			17,078			15,845			17,763		73,757
Loss on issuance of common units by equity method investee	(41		)	—			—			—		(41		)
Operating income	32,324			25,391			25,947			37,928		121,590
Other expenses, net	58,622			9,944			18,684			9,809		97,059
Income (loss) from continuing operations before income taxes	(26,298		)	15,447			7,263			28,119		24,531
Income tax expense (benefit)	(21,407		)	4,658			11,898			16,119		11,268
Income (loss) from continuing operations	(4,891		)	10,789			(4,635		)	12,000		13,263
Income (loss) from discontinued operations, net of income taxes	(2		)	(2		)	3			—		(1		)
Net income (loss)	(4,893		)	10,787			(4,632		)	12,000		13,262
Less: net income attributable to noncontrolling interests	9,020			1,922			225			—		11,167
Net income (loss) attributable to SemGroup	$	(13,913	)	$	8,865		$	(4,857	)	$	12,000	$	2,095
Earnings (loss) per share—basic	$	(0.32	)	$	0.20		$	(0.09	)	$	0.18	$	0.04
Earnings (loss) per share—diluted	$	(0.32	)	$	0.19		$	(0.09	)	$	0.18	$	0.04

Summarized information on our consolidated results of operations for the quarters during the year ended December 31, 2015 is shown below (in thousands, except per share amounts):

	First Quarter		Second Quarter			Third Quarter			Fourth Quarter			Total
Total revenues	$	298,310	$	377,226		$	397,065		$	382,493		$	1,455,094
Loss (gain) on disposal or impairment, net	1,058		1,372			(951		)	9,993			11,472
Other operating costs and expenses	301,206		352,549			376,973			371,512			1,402,240
Total expenses	302,264		353,921			376,022			381,505			1,413,712
Earnings from equity method investments	20,559		23,903			16,237			20,687			81,386
Gain on issuance of common units by equity method investee	—		5,897			136			352			6,385
Operating income	16,605		53,105			37,416			22,027			129,153
Other expenses, net	6,087		9,809			17,829			19,082			52,807
Income from continuing operations before income taxes	10,518		43,296			19,587			2,945			76,346
Income tax expense	4,742		14,861			10,006			3,921			33,530
Income (loss) from continuing operations	5,776		28,435			9,581			(976		)	42,816
Loss from discontinued operations, net of income taxes	—		(2		)	(1		)	(1		)	(4		)
Net income (loss)	5,776		28,433			9,580			(977		)	42,812
Less: net income (loss) attributable to noncontrolling interests	4,310		5,136			4,707			(1,661		)	12,492
Net income attributable to SemGroup	$	1,466	$	23,297		$	4,873		$	684		$	30,320
Earnings per share—basic	$	0.03	$	0.53		$	0.11		$	0.02		$	0.69
Earnings per share—diluted	$	0.03	$	0.53		$	0.11		$	0.02		$	0.69