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Executive Severance	9 Months Ended
Executive Severance	Sep. 30, 2011
Executive Severance [Abstract]
Executive Severance	15. Executive Severance On June 11, 2010, we announced the resignation of our general counsel effective June 15, 2010. Pursuant to the terms of his separation agreement, we accelerated the vesting of certain previously awarded shares of restricted stock resulting in additional stock compensation expense of $0.9 million. In addition, we agreed to pay him a one time cash payment of $1.9 million on December 16, 2010. This total severance of $2.8 million is included in general and administrative expense for the nine month period ended September 30, 2010.