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Stock-Based Compensation (Details) (Restricted Stock Awards [Member], USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Restricted Stock Awards [Member]
         
Shares          
Outstanding beginning balance (in shares)       219,751  
Granted (in shares)       172,611  
Vested (in shares)       (69,046)  
Forfeited (in shares)       (34,091)  
Outstanding ending balance (in shares) 289,225 219,751   289,225  
Weighted Average Grant Date Fair Value          
Outstanding beginning balance (in dollars per share)       $ 19.74  
Granted (in dollars per share)       $ 14.07  
Vested (in dollars per share)       $ 18.58  
Forfeited (in dollars per share)       $ 17.95  
Outstanding ending balance (in dollars per share) $ 16.85 $ 19.74   $ 16.85  
Compensation expense $ 765   $ 451 $ 1,442 $ 1,204
Unrecognized compensation costs $ 2,560 $ 1,857   $ 2,560  
Costs are expected to be recognized over a weighted average period 1 year 8 months 0 days 1 year 2 months 12 days