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Stock-based Compensation (Stock-based Compensation Expense) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation [Abstract]        
Stock-based compensation expense $ 500 $ 618 $ 1,445 $ 1,436
2014 500   500  
2015 1,864   1,864  
2016 1,439   1,439  
2017 1,200   1,200  
2018 778   778  
2019 90   90  
Stock-based compensation expense that has yet to be recognized $ 5,871   $ 5,871