Acquisitions (Proforma Financial Results - Denbury Properties) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010 Denbury Properties [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues	$ 8,986	$ 371,998	$ 360,904	$ 253,386
Total Revenue, Proforma				343,190
Net income (loss)	(12,037)	79,751	88,295	31,913
Net income (loss), Proforma				$ 98,455

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details