Capital Stock and Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Schedule of reconciliation of basic and diluted net income per share

A reconciliation of the components of basic and diluted earnings per common share is presented in the table below:

	2015
	Income			Shares	Per Share
	(in thousands, except per share amounts)
Basic:
Net income attributable to common stock	$	(550,628	)	63,019	$	(8.74	)
Effect of Dilutive Securities:
Dilutive effect of potential common shares issuable	$	—		—
Diluted:
Net income attributable to common stock	$	(550,628	)	63,019	$	(8.74	)

	2014
	Income		Shares	Per Share
	(in thousands, except per share amounts)
Basic:
Net income attributable to common stock	$	193,755	52,826	$	3.67
Effect of Dilutive Securities:
Dilutive effect of potential common shares issuable	$	—	471
Diluted:
Net income attributable to common stock	$	193,755	53,297	$	3.64

	2013
	Income		Shares	Per Share
	(in thousands, except per share amounts)
Basic:
Net income attributable to common stock	$	54,587	42,015	$	1.30
Effect of Dilutive Securities:
Dilutive effect of potential common shares issuable	$	—	240
Diluted:
Net income attributable to common stock	$	54,587	42,255	$	1.29