Acquisitions (Tables)

12 Months Ended

Dec. 31, 2012

Prize [Member]

Summary Of Fair Value Of Assets Acquired And Liabilities Assumed

Oil and gas properties
Evaluated	$	226,670
Unevaluated		6,100
Asset retirement obligation		(4,738)
Environmental liability		(1,891)
Other current liabilities		(993)
Net assets acquired	$	225,148

East Texas Oil Field Properties [Member]

Summary Of Fair Value Of Assets Acquired And Liabilities Assumed

Oil and gas properties
Evaluated	$	215,693
Unevaluated		5,400
Other Assets		1,900
Asset retirement obligation		(9,843)
Other current liabilities		(1,190)
Net assets acquired	$	211,960
Estimated Purchase Price Adjustment (1)		2,346
Cash paid at closing		214,306

Prize And East Texas Oil Field Acquistion [Member]

Proforma Financial Results

		Year Ended
		(Unaudited)
		December 31, 2012		December 31, 2011
		Pro Forma		Pro Forma
Total revenues	$	429,296	$	443,948
Operating income	$	96,177	$	125,322
Net income	$	100,834	$	115,842
Net income per unit:
Common unitholders' (basic)	$	0.63	$	0.69
Common unitholders' (diluted)	$	0.60	$	0.69
Subordinated units (basic and diluted)	$	0.66	$	0.69

Melrose Acquisition [Member]

Summary Of Fair Value Of Assets Acquired And Liabilities Assumed

Allocated cost of Predecessor's acquisition	$	77,763
Oil and gas properties	$	82,781
Asset retirement obligations		(5,018)
Total identifiable net assets	$	77,763

Denbury Properties [Member]

Proforma Financial Results

	2010
	Actual		Pro Forma
Revenues	$	253,386	$	343,190
Net Income (Loss)	$	31,913	$	98,455