Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating loss	$ 540,867	$ 450,195
Capital loss carry forwards	26,141	26,141
Property and equipment	34,683	23,045
Investment in Piceance Energy	32,138	45,172
Derivative instruments	0	1,498
Accrued bonuses	0	0
Trust liabilitiy	1,327	0
Other	1,183	1,506
Total deferred tax assets	636,339	547,557
Valuation allowance	(633,954)	(544,442)
Net deferred tax assets	2,385	3,115
Deferred tax liabilities:
Property and equipment	5	0
Texadian Energy intangibles	2,380	3,083
Prepaid insurance, marketable securities and other	0	32
State liabilities	216	0
Total deferred tax liabilities	2,601	3,115
Total deferred tax liability, net	$ (216)	$ 0