Income Taxes (Tables)

6 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Schedule of provision for income taxes

The provision for income taxes consists of the following:

	For the Three Months Ended June 30,						For the Six Months Ended June 30,
	2014			2013			2014			2013
	(in thousands)
Current portion of income tax expense:
Federal	$	—		$	—		$	—		$	—
State	512			246			1,001			348
Deferred portion of income tax expense	35,537			45,959			73,911			56,239
Total income tax expense	$	36,049		$	46,205		$	74,912		$	56,587
	37.6		%	37.6		%	37.4		%	37.8		%