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Credit Facility (Notes)
12 Months Ended
Dec. 31, 2012
Line of Credit Facility [Abstract]  
Credit Facility
10. Credit Facility
The Company has a revolving credit facility of $30.0 million based upon a percentage of eligible accounts receivable. Included in the revolving line are amounts available under letters of credit and cash management services. The Company had outstanding letters of credit totaling $3.3 million and $2.8 million as of December 31, 2012 and December 31, 2011, respectively. There were no outstanding borrowings under the revolving credit facility as of December 31, 2012 and December 31, 2011. As of December 31, 2012, there was approximately $26.7 million available for borrowing under this revolving credit facility. The Company is also required to pay commitment fees of 0.25% per year on any unused portions of the facility. As of December 31, 2012 and December 31, 2011, the Company was in compliance with its financial covenants under the credit facility. The revolving credit facility matures on June 30, 2013.