Acquisitions

6 Months Ended

Jun. 30, 2012

Acquisitions [Abstract]

Acquisitions [Text Block]

Acquisitions

On May 18, 2012, the Company acquired a 50 percent undivided interest in natural gas and oil midstream assets in western North Dakota. The acquisition includes a natural gas processing plant and a natural gas gathering pipeline system, along with an oil gathering system, an oil storage terminal and an oil pipeline. The total purchase consideration for its interest in the facilities was approximately $66.0 million. The company recognizes its proportionate share of the assets, liabilities, revenues and expenses related to this acquisition. Proforma financial amounts reflecting the effects of the above acquisition have not been presented, as the acquisition was not material to the Company's financial position or results of operations.