Accrued And Other Liabilities (Schedule Of Accrued And Other Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accrued And Other Liabilities [Abstract]
Accrued lease operating expenses	$ 19,843	$ 20,297
Accrued capital spending	19,530	16,316
Distributions payable	14,144	14,155
Gas imbalance asset (liability)	(6,464)	(6,214)
Accrued production and other taxes	5,946	6,270
Senior notes accrued interest	4,625	11,563
Accrued transaction costs	3,631	203
Other	4,783	4,027
Total accrued and other liabilities	$ 78,966	$ 79,045