Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Basic and diluted earnings per share

The following summarizes the calculation of basic earnings per share for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per share amounts):

	Three Months Ended June 30, 2016							Three Months Ended June 30, 2015
	Continuing Operations		Discontinued Operations			Net		Continuing Operations		Discontinued Operations			Net
Income (loss)	$	9,933	$	(2	)	$	9,931	$	28,435	$	(2	)	$	28,433
less: Income attributable to noncontrolling interests	1,922		—			1,922		5,136		—			5,136
Income (loss) attributable to SemGroup	$	8,011	$	(2	)	$	8,009	$	23,299	$	(2	)	$	23,297
Weighted average common stock outstanding	45,236		45,236			45,236		43,798		43,798			43,798
Basic earnings (loss) per share	$	0.18	$	—		$	0.18	$	0.53	$	—		$	0.53

	Six Months Ended June 30, 2016									Six Months Ended June 30, 2015
	Continuing Operations			Discontinued Operations			Net			Continuing Operations		Discontinued Operations			Net
Income (loss)	$	3,687		$	(4	)	$	3,683		$	34,211	$	(2	)	$	34,209
less: Income attributable to noncontrolling interests	10,942			—			10,942			9,446		—			9,446
Income (loss) attributable to SemGroup	$	(7,255	)	$	(4	)	$	(7,259	)	$	24,765	$	(2	)	$	24,763
Weighted average common stock outstanding	44,553			44,553			44,553			43,758		43,758			43,758
Basic earnings (loss) per share	$	(0.16	)	$	—		$	(0.16	)	$	0.57	$	—		$	0.57

The following summarizes the calculation of diluted earnings per share for the three months and six months ended June 30, 2016 and 2015 (in thousands, except per share amounts):

	Three Months Ended June 30, 2016							Three Months Ended June 30, 2015
	Continuing Operations		Discontinued Operations			Net		Continuing Operations		Discontinued Operations			Net
Income (loss)	$	9,933	$	(2	)	$	9,931	$	28,435	$	(2	)	$	28,433
less: Income attributable to noncontrolling interests	1,922		—			1,922		5,136		—			5,136
Income (loss) attributable to SemGroup	$	8,011	$	(2	)	$	8,009	$	23,299	$	(2	)	$	23,297
Weighted average common stock outstanding	45,236		45,236			45,236		43,798		43,798			43,798
Effect of dilutive securities	411		411			411		215		215			215
Diluted weighted average common stock outstanding	45,647		45,647			45,647		44,013		44,013			44,013
Diluted earnings (loss) per share	$	0.18	$	—		$	0.18	$	0.53	$	—		$	0.53

	Six Months Ended June 30, 2016									Six Months Ended June 30, 2015
	Continuing Operations			Discontinued Operations			Net			Continuing Operations		Discontinued Operations			Net
Income (loss)	$	3,687		$	(4	)	$	3,683		$	34,211	$	(2	)	$	34,209
less: Income attributable to noncontrolling interests	10,942			—			10,942			9,446		—			9,446
Income (loss) attributable to SemGroup	$	(7,255	)	$	(4	)	$	(7,259	)	$	24,765	$	(2	)	$	24,763
Weighted average common stock outstanding	44,553			44,553			44,553			43,758		43,758			43,758
Effect of dilutive securities	—			—			—			217		217			217
Diluted weighted average common stock outstanding	44,553			44,553			44,553			43,975		43,975			43,975
Diluted earnings (loss) per share	$	(0.16	)	$	—		$	(0.16	)	$	0.56	$	—		$	0.56