Fair Value Measurements (Fair Value Heirarchy Table) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Asset, Current		$ 5
Derivative Asset, Long-term	94	9,942
Total Derivative Assets	94	9,947
Derivative Liability, Current	(185,454)	(53,822)
Derivative Liability, Long-term	(36,027)	(3,413)
Total Derivative Liabilities	(221,481)	(57,235)
Quoted Prices in Active Markets (Level 1) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Asset, Current		0
Derivative Asset, Long-term	0	0
Total Derivative Assets	0	0
Derivative Liability, Current	0	0
Derivative Liability, Long-term	0	0
Total Derivative Liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Asset, Current		5
Derivative Asset, Long-term	94	3,034
Total Derivative Assets	94	3,039
Derivative Liability, Current	(159,707)	(53,822)
Derivative Liability, Long-term	(22,658)	(3,214)
Total Derivative Liabilities	(182,365)	(57,036)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Asset, Current		0
Derivative Asset, Long-term	0	6,908
Total Derivative Assets	0	6,908
Derivative Liability, Current	(25,747)	0
Derivative Liability, Long-term	(13,369)	(199)
Total Derivative Liabilities	$ (39,116)	$ (199)