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Stock-Based Compensation Summary of Stock Option Activity (Details) (USD $)
9 Months Ended
Sep. 30, 2014
Time-Based
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Balance, December 31, 2013 1,930,407
Granted 15,000
Exercised (391,389)
Canceled/forfeited (77,926)
Balance, September 30, 2014 1,476,092
Weighted average remaining contractual term for options outstanding 3 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Balance, December 31, 2013 $ 4.22
Granted $ 8.27
Exercised $ 3.10
Canceled/forfeited $ 7.89
Balance, September 30, 2014 $ 4.36
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]  
Balance, December 31, 2013 1,806,251
Vested 50,405
Exercised (391,389)
Canceled/forfeited (77,926)
Balance, September 30, 2014 1,387,341
Weighted average remaining contractual term for options exercisable 2 years 10 months 25 days
Balance, December 31, 2013 $ 3.98
Vested $ 2.89
Exercised $ 3.10
Canceled/forfeited $ 7.89
Balance, September 30, 2014 $ 4.14
Performance-Based
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Balance, December 31, 2013 289,306
Granted 0
Exercised 0
Canceled/forfeited (28,604)
Balance, September 30, 2014 260,702
Weighted average remaining contractual term for options outstanding 8 years 0 months 0 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Balance, December 31, 2013 $ 8.46
Granted $ 0.00
Exercised $ 0.00
Canceled/forfeited $ 8.42
Balance, September 30, 2014 $ 8.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]  
Balance, December 31, 2013 0
Exercised 0
Canceled/forfeited (28,604)
Balance, September 30, 2014 0
Balance, December 31, 2013 $ 0.00
Exercised $ 0.00
Canceled/forfeited $ 8.42
Balance, September 30, 2014 $ 0.00
Management [Member] | Time-Based
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Granted 15,000