Income Taxes Components of current and deferred income tax expense (benefit) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current provision (benefit)
Federal									$ 5,725	$ (8,523)	$ (71,796)
State and other									(1,596)	(14,068)	(28,116)
Current Income Tax Expense (Benefit)									4,129	(22,591)	(99,912)
Deferred provision (benefit)
Federal									(1,833,580)	0	0
State and other									(262,843)	0	0
Deferred tax assets, net	2,086,754				0				2,086,754	0
Deferred Income Tax Expense (Benefit)									(2,096,423)	0	0
Income tax expense (benefit)	$ 12,367	$ (2,107,162)	$ 1,913	$ 588	$ (7,529)	$ (10,727)	$ (2,510)	$ (1,825)	$ (2,092,294)	$ (22,591)	$ (99,912)