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Share-Based Compensation (Stock Option Activity) (Details)
9 Months Ended
Sep. 30, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value [Roll Forward]  
Granted, Weighted Average Grant Date Fair Value (dollars per share) $ 6.15
Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Acquired, Number of Options (in shares) | shares 1,466,408
Stock Options [Member] | Non Vested [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Beginning balance, Number of Options (in shares) | shares 479,755
Acquired, Number of Options (in shares) | shares 0
Granted, Number of Options (in shares) | shares 441,167
Exercised, Number of Options (in shares) | shares 0
Vested, Number of Options (in shares) | shares (454,360)
Forfeited/expired, Number of Options (in shares) | shares (47,286)
Ending balance, Number of Options (in shares) | shares 419,276
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Beginning balance, Weighted Average Exercise Price (dollars per share) $ 28.75
Acquired, Weighted Average Exercise Price (dollars per share) 0.00
Granted, Weighted Average Exercise Price (dollars per share) 32.81
Exercised, Weighted Average Exercise Price (dollars per share) 0.00
Vested, Weighted Average Exercise Price (dollars per share) 28.74
Forfeited/expired, Weighted Average Exercise Price (dollars per share) 30.69
Ending balance, Weighted Average Exercise Price (dollars per share) 32.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value [Roll Forward]  
Beginning balance, Weighted average grant date fair value (dollars per share) 8.49
Acquired, Weighted Average Grant Date Fair Value (dollars per share) 0.00
Granted, Weighted Average Grant Date Fair Value (dollars per share) 0.00
Exercised, Weighted Average Grant Date Fair Value (dollars per share) 0.00
Vested, Weighted Average Grant Date Fair Value (dollars per share) 8.49
Forfeited/expired, Weighted Average Grant Date Fair Value (dollars per share) 7.42
Ending balance, Weighted average grant date fair value (dollars per share) $ 6.15
Stock Options [Member] | Vested & Nonvested [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Beginning balance, Number of Options (in shares) | shares 1,054,739
Acquired, Number of Options (in shares) | shares 1,466,408
Granted, Number of Options (in shares) | shares 441,167
Exercised, Number of Options (in shares) | shares (220,026)
Vested, Number of Options (in shares) | shares 0
Forfeited/expired, Number of Options (in shares) | shares (47,286)
Ending balance, Number of Options (in shares) | shares 2,695,002
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Beginning balance, Weighted Average Exercise Price (dollars per share) $ 25.38
Acquired, Weighted Average Exercise Price (dollars per share) 15.08
Granted, Weighted Average Exercise Price (dollars per share) 32.81
Exercised, Weighted Average Exercise Price (dollars per share) 24.08
Vested, Weighted Average Exercise Price (dollars per share) 0.00
Forfeited/expired, Weighted Average Exercise Price (dollars per share) 30.69
Ending balance, Weighted Average Exercise Price (dollars per share) $ 21.01
Stock Options [Member] | Vested [Member]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value [Roll Forward]  
Exercisable/vested, Number of Options (in shares) | shares 2,275,726
Exercisable/vested, Weighted Average Exercise Price (dollars per share) $ 18.84