Fair Value Measures (Partnership's Derivative Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Sep. 02, 2009
Fair Value Measurement, Assets	$ 4,848	$ 2,673
Embedded Derivatives in Series A Preferred Units			28,900
Transfers Between Level 2 Level 3 Derivatives Amount	0
Fair Value, Measurements, Recurring [Member]
Fair Value Measurement, Assets	4,848	2,673
Interest Rate Derivatives	470	2,584
Fair Value Measurement, Liabilities	49,647	74,299
Embedded Derivatives in Series A Preferred Units	39,049	57,023
Fair Value, Measurements, Recurring [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurement, Assets	4,848	2,673
Interest Rate Derivatives	470	2,584
Fair Value Measurement, Liabilities	10,598	17,276
Embedded Derivatives in Series A Preferred Units	0	0
Fair Value, Measurements, Recurring [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Measurement, Assets	0	0
Interest Rate Derivatives	0	0
Fair Value Measurement, Liabilities	39,049	57,023
Embedded Derivatives in Series A Preferred Units	39,049	57,023
Fair Value, Measurements, Recurring [Member] | Natural Gas [Member]
Fair Value Measurement, Assets	3,907	2,481
Fair Value Measurement, Liabilities	0	427
Fair Value, Measurements, Recurring [Member] | Natural Gas [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurement, Assets	3,907	2,481
Fair Value Measurement, Liabilities	0	427
Fair Value, Measurements, Recurring [Member] | Natural Gas [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Measurement, Assets	0	0
Fair Value Measurement, Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | NGLs [Member]
Fair Value Measurement, Assets	94	192
Fair Value Measurement, Liabilities	8,561	10,684
Fair Value, Measurements, Recurring [Member] | NGLs [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurement, Assets	94	192
Fair Value Measurement, Liabilities	8,561	10,684
Fair Value, Measurements, Recurring [Member] | NGLs [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Measurement, Assets	0	0
Fair Value Measurement, Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Condensate [Member]
Fair Value Measurement, Assets	538	0
Fair Value Measurement, Liabilities	1,567	3,581
Fair Value, Measurements, Recurring [Member] | Condensate [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurement, Assets	538	0
Fair Value Measurement, Liabilities	1,567	3,581
Fair Value, Measurements, Recurring [Member] | Condensate [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Measurement, Assets	0	0
Fair Value Measurement, Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Ethane - Put Options [Member]
Fair Value Measurement, Assets	309	0
Fair Value, Measurements, Recurring [Member] | Ethane - Put Options [Member] | Significant Observable Inputs (Level 2) [Member]
Fair Value Measurement, Assets	309	0
Fair Value, Measurements, Recurring [Member] | Ethane - Put Options [Member] | Unobservable Inputs (Level 3) [Member]
Fair Value Measurement, Assets	$ 0	$ 0