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Commitments And Contingencies
 3 Months Ended
Mar. 31, 2012
Commitments And Contingencies [Abstract]  
Commitments And Contingencies

11. Commitments and Contingencies

Lease obligations. The Company's total rental commitments under non-cancelable leases for office space and other property and equipment at March 31, 2012 were $12.3 million.

Drilling contracts. As of March 31, 2012, the Company had certain drilling rig contracts with initial terms greater than one year. In the event of early contract termination under these contracts, the Company would be obligated to pay approximately $62.3 million as of March 31, 2012 for the days remaining through the end of the primary terms of the contracts.

Volume commitment agreements. As of March 31, 2012, the Company had certain agreements with an aggregate requirement to deliver a minimum quantity of approximately 13.1 MMBbl and 17.6 Bcf from its Williston Basin project areas within a specified timeframe. Future obligations under these agreements were approximately $65.5 million as of March 31, 2012.

Fracturing services. As of March 31, 2012, the Company had certain agreements with third party fracturing service companies for an initial term greater than one year. In the event of early contract termination under these agreements, the Company would be obligated to pay approximately $66.6 million as of March 31, 2012 for the months remaining through the end of the primary term of the agreements.

Litigation. The Company is party to various legal and/or regulatory proceedings from time to time arising in the ordinary course of business. The Company believes all such matters are without merit and involve amounts which, if resolved unfavorably, either individually or in the aggregate, will not have a material adverse effect on its financial condition, results of operations or cash flows.