Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of dilutive and antidilutive securities included or excluded from computation of earnings per share [Table Text Block]

The following table details the weighted-average dilutive and anti-dilutive securities for the periods presented:

	For the Three Months Ended March 31,
	2019	2018
	(in thousands)
Dilutive	—	1,183
Anti-dilutive	781	—

Schedule of calculations of basic and diluted net loss per common share [Table Text Block]

The following table sets forth the calculations of basic and diluted net income (loss) per common share:

	For the Three Months Ended March 31,
	2019			2018
	(in thousands, except per share data)
Net income (loss)	$	(177,568	)	$	317,401
Basic weighted-average common shares outstanding	112,252			111,696
Dilutive effect of non-vested RSUs and contingent PSUs	—			1,183
Dilutive effect of Senior Convertible Notes	—			—
Diluted weighted-average common shares outstanding	112,252			112,879
Basic net income (loss) per common share	$	(1.58	)	$	2.84
Diluted net income (loss) per common share	$	(1.58	)	$	2.81