Income Taxes (Tables)

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of provision for income taxes [Table Text Block]

The provision for income taxes for the three months ended March 31, 2019, and 2018, consisted of the following:

	For the Three Months Ended March 31,
	2019			2018
	(in thousands)
Current portion of income tax (expense) benefit:
Federal	$	—		$	—
State	(965		)	(625		)
Deferred portion of income tax (expense) benefit	47,003			(98,366		)
Income tax (expense) benefit	$	46,038		$	(98,991	)
Effective tax rate	20.6		%	23.8		%