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Stock-Based Compensation Summary of Stock Option Activity (Details) (USD $)
6 Months Ended
Jun. 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 (74,176)
Balance, June 30, 2014 1,479,842
Weighted average remaining contractual term for options outstanding 3 years 6 months 0 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 $ 7.90
Balance, June 30, 2014 $ 4.37
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]  
Balance, December 31, 2013 1,806,251
Vested 3,125
Exercised (391,389)
Canceled/forfeited (74,176)
Balance, June 30, 2014 1,343,811
Weighted average remaining contractual term for options exercisable 3 years 0 months 0 days
Balance, December 31, 2013 $ 3.98
Vested $ 2.81
Exercised $ 3.10
Canceled/forfeited $ 7.90
Balance, June 30, 2014 $ 4.02
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 0
Balance, June 30, 2014 289,306
Weighted average remaining contractual term for options outstanding 8 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 $ 8.46
Granted $ 0.00
Exercised $ 0.00
Canceled/forfeited $ 0.00
Balance, June 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 0
Balance, June 30, 2014 0
Balance, December 31, 2013 $ 0.00
Exercised $ 0.00
Canceled/forfeited $ 0.00
Balance, June 30, 2014 $ 0.00
Management [Member] | Time-Based
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Granted 15,000