Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Long-term debt consists of the following:

	September 30, 2014			December 31, 2013
	(in thousands)
Senior notes:
3.25% Convertible senior notes due 2016:
Principal amount	$	115,000		$	115,000
Unamortized discount	(7,087		)	(10,010		)
3.25% Convertible senior notes due 2016, net of discount	107,913			104,990
7.75% Senior notes due 2022	500,000			500,000
Total senior notes	607,913			604,990
Revolving credit facility	68,000			—
Long-term debt	675,913			604,990
PDCM credit facility	44,750			37,000
PDCM second lien term loan	15,000			15,000
PDCM long-term debt (included in liabilities held for sale - non-current)	59,750			52,000
Total debt	$	735,663		$	656,990