Commitments and Contingencies	3 Months Ended
Mar. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Litigation A putative class action lawsuit was filed by the Northumberland County Retirement System and Oklahoma Law Enforcement Retirement System in the District Court in Oklahoma County, Oklahoma, purportedly on March 10, 2011, against the Company and certain of its officers along with certain underwriters of the Company's July 2008, May 2009 and October 2009 public offerings. Discovery requests and summons were filed and issued in late April 2011. The complaint alleges that the registration statement and the prospectus for contained material misstatements and omissions and seeks damages under Sections 11, 12 and 15 of the Securities Act of 1933 of an unspecified equitable relief. Defendants removed the case to federal court on May 12, 2011 and filed motions to dismiss on June 20, 2011. Plaintiffs filed a motion to remand the case to state court on June 10, 2011, and Defendants filed an opposition to that motion. By order dated November 16, 2011, the court denied Plaintiffs' motion to remand. On February 3, 2012, Plaintiffs moved to be appointed lead plaintiff under the Private Securities Litigation Reform Act. After the appointment of lead plaintiff, Plaintiffs are expected to file an amended complaint, with Defendants' responses thereto expected to be filed later in 2012. We are currently unable to assess the probability of loss or estimate a range of potential loss, if any, associated with the securities class action case, which is at an early stage. On August 5, 2011, an individual filed a shareholders' derivative action in the United States District Court for the Western District of Oklahoma, for the Company's benefit, as nominal defendant, against the Company's Chief Executive Officer, President, Chief Financial Officer, and certain members of the Company's board of directors. The complaint alleges breaches of fiduciary duty, waste of corporate assets, and unjust enrichment on the part of each of the named defendants and is premised on substantially the same facts alleged in the above-described securities lawsuit. The complaint seeks unspecified amounts of compensatory damages, implementation of certain corporate governance changes, and disgorgement of compensation and trading profits from the individual defendants, as well as interest and costs, including legal fees from the defendants. The Company is a nominal defendant, and the complaint does not seek any damages against the Company; however, the Company may have indemnification obligations to one or more of the defendants under the Company's organizational documents. On October 17, 2011, the individual defendants and the Company as nominal defendant filed motions to dismiss the complaint for failure to make demand, or in the alternative, to stay the derivative action pending the outcome of the securities lawsuit. The case is currently stayed pending the outcome of the motions to dismiss that are expected to be filed with respect to the securities lawsuit described above. On March 23, 2012, an additional plaintiff filed a similar derivative action in the United States District Court for the Western District of Oklahoma. The parties have agreed that this case will be consolidated with the existing federal court derivative action, and papers to this effect are expected to be filed in the near term. We are currently unable to assess the probability of loss or estimate a range of potential loss, if any, associated with this case. On February 7 and 9, 2012, two individuals filed separate shareholder derivative actions in the District Court of Oklahoma County, in the State of Oklahoma, for the Company's benefit, as nominal defendant, against the Company's Chief Executive Officer, President, Chief Financial Officer, and each member of the Company's board of directors. The petitions assert claims and seek relief similar to those asserted and sought in the federal court derivative action described above. Plaintiffs recently filed a motion to consolidate the two state court derivative actions, and the court consolidated the two actions. The parties have agreed that plaintiffs will file an amended and consolidated petition after the plaintiffs in the federal securities action described above file their amended complaint. On April 9, 2012, defendants filed a motion to dismiss, a motion to stay, and a motion for protection from discovery. The motions are expected to be fully briefed by early May 2012, with a hearing on the motions expected be scheduled thereafter. We are currently unable to assess the probability of loss or estimate a range of potential loss, if any, associated with this case. The Company is party to various legal actions arising in the normal course of business. Matters that are probable of unfavorable outcome to the Company and which can be reasonably estimated are accrued. Such accruals are based on information known about the matters, the Company's estimates of the outcomes of such matters, and its experience in contesting, litigating, and settling similar matters. None of the actions are believed by management to involve future amounts that would be material to the Company's financial position or results of operations after consideration of recorded accruals. Insurance Matters The Company maintains property damage, business interruption and other insurance coverage, the scope and amounts of which we believe are customary and prudent for the nature and extent of our operations. The Company also believes its deductibles are consistent with customary and prudent industry practices and does not expect that the payment of any deductibles would have a material adverse effect on the Company's financial condition or results of operations. While we believe the Company maintains adequate insurance coverage, insurance may not fully cover every type of damage, interruption or other loss that might occur. If we were to incur a significant loss for which we were not fully insured, it could have a material impact on our financial position, results of operations and cash flows. In addition, there may be a timing difference between amounts we are required to pay in connection with a loss and amounts we receive from insurance as reimbursement. Any event that materially interrupts the revenues generated by our consolidated operations, or other losses that require us to make material expenditures not covered by insurance, could adversely affect our cash flows and financial condition and, accordingly, adversely affect the market price of our securities.

COMMITMENTS AND CONTINGENCIES

Litigation

A putative class action lawsuit was filed by the Northumberland County Retirement System and Oklahoma Law Enforcement Retirement System in the District Court in Oklahoma County, Oklahoma, purportedly on March 10, 2011, against the Company and certain of its officers along with certain underwriters of the Company's July 2008, May 2009 and October 2009 public offerings. Discovery requests and summons were filed and issued in late April 2011. The complaint alleges that the registration statement and the prospectus for contained material misstatements and omissions and seeks damages under Sections 11, 12 and 15 of the Securities Act of 1933 of an unspecified equitable relief. Defendants removed the case to federal court on May 12, 2011 and filed motions to dismiss on June 20, 2011. Plaintiffs filed a motion to remand the case to state court on June 10, 2011, and Defendants filed an opposition to that motion. By order dated November 16, 2011, the court denied Plaintiffs' motion to remand. On February 3, 2012, Plaintiffs moved to be appointed lead plaintiff under the Private Securities Litigation Reform Act. After the appointment of lead plaintiff, Plaintiffs are expected to file an amended complaint, with Defendants' responses thereto expected to be filed later in 2012. We are currently unable to assess the probability of loss or estimate a range of potential loss, if any, associated with the securities class action case, which is at an early stage.

On August 5, 2011, an individual filed a shareholders' derivative action in the United States District Court for the Western District of Oklahoma, for the Company's benefit, as nominal defendant, against the Company's Chief Executive Officer, President, Chief Financial Officer, and certain members of the Company's board of directors. The complaint alleges breaches of fiduciary duty, waste of corporate assets, and unjust enrichment on the part of each of the named defendants and is premised on substantially the same facts alleged in the above-described securities lawsuit. The complaint seeks unspecified amounts of compensatory damages, implementation of certain corporate governance changes, and disgorgement of compensation and trading profits from the individual defendants, as well as interest and costs, including legal fees from the defendants. The Company is a nominal defendant, and the complaint does not seek any damages against the Company; however, the Company may have indemnification obligations to one or more of the defendants under the Company's organizational documents. On October 17, 2011, the individual defendants and the Company as nominal defendant filed motions to dismiss the complaint for failure to make demand, or in the alternative, to stay the derivative action pending the outcome of the securities lawsuit. The case is currently stayed pending the outcome of the motions to dismiss that are expected to be filed with respect to the securities lawsuit described above. On March 23, 2012, an additional plaintiff filed a similar derivative action in the United States District Court for the Western District of Oklahoma. The parties have agreed that this case will be consolidated with the existing federal court derivative action, and papers to this effect are expected to be filed in the near term. We are currently unable to assess the probability of loss or estimate a range of potential loss, if any, associated with this case.

On February 7 and 9, 2012, two individuals filed separate shareholder derivative actions in the District Court of Oklahoma County, in the State of Oklahoma, for the Company's benefit, as nominal defendant, against the Company's Chief Executive Officer, President, Chief Financial Officer, and each member of the Company's board of directors. The petitions assert claims and seek relief similar to those asserted and sought in the federal court derivative action described above. Plaintiffs recently filed a motion to consolidate the two state court derivative actions, and the court consolidated the two actions. The parties have agreed that plaintiffs will file an amended and consolidated petition after the plaintiffs in the federal securities action described above file their amended complaint. On April 9, 2012, defendants filed a motion to dismiss, a motion to stay, and a motion for protection from discovery. The motions are expected to be fully briefed by early May 2012, with a hearing on the motions expected be scheduled thereafter. We are currently unable to assess the probability of loss or estimate a range of potential loss, if any, associated with this case.

The Company is party to various legal actions arising in the normal course of business. Matters that are probable of unfavorable outcome to the Company and which can be reasonably estimated are accrued. Such accruals are based on information known about the matters, the Company's estimates of the outcomes of such matters, and its experience in contesting, litigating, and settling similar matters. None of the actions are believed by management to involve future amounts that would be material to the Company's financial position or results of operations after consideration of recorded accruals.

Insurance Matters

The Company maintains property damage, business interruption and other insurance coverage, the scope and amounts of which we believe are customary and prudent for the nature and extent of our operations. The Company also believes its deductibles are consistent with customary and prudent industry practices and does not expect that the payment of any deductibles would have a material adverse effect on the Company's financial condition or results of operations. While we believe the Company maintains adequate insurance coverage, insurance may not fully cover every type of damage, interruption or other loss that might occur. If we were to incur a significant loss for which we were not fully insured, it could have a material impact on our financial position, results of operations and cash flows. In addition, there may be a timing difference between amounts we are required to pay in connection with a loss and amounts we receive from insurance as reimbursement. Any event that materially interrupts the revenues generated by our consolidated operations, or other losses that require us to make material expenditures not covered by insurance, could adversely affect our cash flows and financial condition and, accordingly, adversely affect the market price of our securities.