Major Customers (Details) (Crude oil and natural gas revenues)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012 item	Dec. 31, 2011 item
Operator
Major Customers
Number of major customers	1	1	1
Partnership's crude oil and natural gas revenues (as a percent)	54.80%	79.90%	63.90%
Marketer
Major Customers
Number of major customers	1	1	1
Partnership's crude oil and natural gas revenues (as a percent)	40.90%	14.40%	27.50%