Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2015

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, 2015 and 2014 (in thousands, except per share amounts):

	Three Months Ended June 30, 2015							Three Months Ended June 30, 2014
	Continuing Operations		Discontinued Operations			Net		Continuing Operations			Discontinued Operations		Net
Income (loss)	$	28,435	$	(2	)	$	28,433	$	(12,584	)	$	—	$	(12,584	)
less: Income attributable to noncontrolling interests	5,136		—			5,136		5,025			—		5,025
Income attributable to SemGroup	$	23,299	$	(2	)	$	23,297	$	(17,609	)	$	—	$	(17,609	)
Weighted average common stock outstanding	43,798		43,798			43,798		42,682			42,682		42,682
Basic earnings per share	$	0.53	$	—		$	0.53	$	(0.41	)	$	—	$	(0.41	)

	Six Months Ended June 30, 2015							Six Months Ended June 30, 2014
	Continuing Operations		Discontinued Operations			Net		Continuing Operations			Discontinued Operations			Net
Income (loss)	$	34,211	$	(2	)	$	34,209	$	7,159		$	(5	)	$	7,154
less: Income attributable to noncontrolling interests	9,446		—			9,446		11,250			—			11,250
Income attributable to SemGroup	$	24,765	$	(2	)	$	24,763	$	(4,091	)	$	(5	)	$	(4,096	)
Weighted average common stock outstanding	43,758		43,758			43,758		42,657			42,657			42,657
Basic earnings per share	$	0.57	$	—		$	0.57	$	(0.10	)	$	—		$	(0.10	)

The following summarizes the calculation of diluted earnings per share for the three months and six months ended June 30, 2015 and 2014 (in thousands, except per share amounts):

	Three Months Ended June 30, 2015							Three Months Ended June 30, 2014
	Continuing Operations		Discontinued Operations			Net		Continuing Operations			Discontinued Operations		Net
Income (loss)	$	28,435	$	(2	)	$	28,433	$	(12,584	)	$	—	$	(12,584	)
less: Income attributable to noncontrolling interests	5,136		—			5,136		5,025			—		5,025
Income attributable to SemGroup	$	23,299	$	(2	)	$	23,297	$	(17,609	)	$	—	$	(17,609	)
Weighted average common stock outstanding	43,798		43,798			43,798		42,682			42,682		42,682
Effect of dilutive securities	215		215			215		—			—		—
Diluted weighted average common stock outstanding	44,013		44,013			44,013		42,682			42,682		42,682
Diluted earnings per share	$	0.53	$	—		$	0.53	$	(0.41	)	$	—	$	(0.41	)

	Six Months Ended June 30, 2015							Six Months Ended June 30, 2014
	Continuing Operations		Discontinued Operations			Net		Continuing Operations			Discontinued Operations			Net
Income (loss)	$	34,211	$	(2	)	$	34,209	$	7,159		$	(5	)	$	7,154
less: Income attributable to noncontrolling interests	9,446		—			9,446		11,250			—			11,250
Income attributable to SemGroup	$	24,765	$	(2	)	$	24,763	$	(4,091	)	$	(5	)	$	(4,096	)
Weighted average common stock outstanding	43,758		43,758			43,758		42,657			42,657			42,657
Effect of dilutive securities	217		217			217		—			—			—
Diluted weighted average common stock outstanding	43,975		43,975			43,975		42,657			42,657			42,657
Diluted earnings per share	$	0.56	$	—		$	0.56	$	(0.10	)	$	—		$	(0.10	)