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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Effective tax rate 96.90% (13.30%) 164.80% 2.20%
Change in fair value of earn-out obligation $ 628    $ (6,867)