Special Charges and Credits	3 Months Ended
Mar. 31, 2013
Restructuring and Related Activities [Abstract]
Special Charges and Credits	Special Charges and Credits Ronald Reagan National Airport Exit Charges Special charges and credits for the three months ended March 31, 2013 mainly included exit charges related to the early termination of the Company's lease at Ronald Reagan National Airport (“DCA”) due to the relocation of business activities from DCA to Baltimore Washington International Airport ("BWI") in the third quarter of 2012. Secondary Offering Costs On January 25, 2012, certain stockholders of the Company, including affiliates of Oaktree and Indigo Partners, LLC ("Indigo") and certain members of the Company's executive team, sold an aggregate of 12,650,000 shares of common stock in an underwritten public offering. The Company incurred a total of $1.3 million in costs between 2011 and 2012 related to this offering, of which $0.2 million were incurred during the first quarter of 2012. These costs were offset by reimbursements from certain selling shareholders of $0.6 million in accordance with the Fourth Amendment to the Second Amended and Restated Investor Rights Agreement, of which were $0.3 million were received during the first quarter of 2012. Accordingly, special charges and credits in the Company's Statement of Operations for the three months ended March 31, 2012 were $(0.1) million. The Company did not receive any proceeds from this offering.

Special Charges and Credits

Ronald Reagan National Airport Exit Charges

Special charges and credits for the three months ended March 31, 2013 mainly included exit charges related to the early termination of the Company's lease at Ronald Reagan National Airport (“DCA”) due to the relocation of business activities from DCA to Baltimore Washington International Airport ("BWI") in the third quarter of 2012.

Secondary Offering Costs

On January 25, 2012, certain stockholders of the Company, including affiliates of Oaktree and Indigo Partners, LLC ("Indigo") and certain members of the Company's executive team, sold an aggregate of 12,650,000 shares of common stock in an underwritten public offering. The Company incurred a total of $1.3 million in costs between 2011 and 2012 related to this offering, of which $0.2 million were incurred during the first quarter of 2012. These costs were offset by reimbursements from certain selling shareholders of $0.6 million in accordance with the Fourth Amendment to the Second Amended and Restated Investor Rights Agreement, of which were $0.3 million were received during the first quarter of 2012. Accordingly, special charges and credits in the Company's Statement of Operations for the three months ended March 31, 2012 were $(0.1) million. The Company did not receive any proceeds from this offering.