Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Jan. 31, 2013
AIA Purchase Agreement
Jun. 30, 2013
Federal
Dec. 31, 2012
Federal
Jun. 30, 2013
State and Local
Dec. 31, 2012
State and Local
Jun. 30, 2013
Domestic Deferred Tax Assets
Dec. 31, 2012
Domestic Deferred Tax Assets
Jun. 30, 2013
Foreign Deferred Tax Assets
Dec. 31, 2012
Foreign Deferred Tax Assets
Valuation Allowance [Line Items]                            
Income tax benefit (expense) $ 559,000 $ 34,000 $ 0 $ 593,000 $ 0                  
Valuation allowance                     45,900,000 39,600,000 600,000 0
Business combination, deferred tax liabilities, net           24,700,000                
Operating loss carryforwards             $ 90,500,000 $ 81,000,000 $ 55,400,000 $ 53,100,000