Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Business Acquisition, Pro Forma Information (Details)

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Basis of Presentation and Summary of Significant Accounting Policies - Business Acquisition, Pro Forma Information (Details) (AIA Purchase Agreement, USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
AIA Purchase Agreement
       
Business Acquisition, Pro Forma Information [Abstract]        
Revenues $ 62,831 $ 58,989 $ 118,670 $ 118,894
Net loss $ (13,638) $ (19,036) $ (40,682) $ (31,733)
Basic and diluted net loss per share (in dollars per share) $ (0.25) $ (0.94) $ (0.83) $ (1.56)