Annual report pursuant to Section 13 and 15(d)

Common Stock, Stock-Based Awards and Warrants - Stock Options by Exercise Price (Details)

v3.8.0.1
Common Stock, Stock-Based Awards and Warrants - Stock Options by Exercise Price (Details)
shares in Thousands
 12 Months Ended
Dec. 31, 2016
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding (in shares) | shares 6,746
Weighted Average Remaining Contractual Term (in years) 2 years 8 months 12 days
Weighted Average Exercise Price (in dollars per share) $ 10.36
Number Exercisable (in shares) | shares 3,837
Weighted Average Exercise Price (in dollars per share) $ 10.81
$12.90 - $16.70  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding (in shares) | shares 1,215
Weighted Average Remaining Contractual Term (in years) 2 years 10 months 12 days
Weighted Average Exercise Price (in dollars per share) $ 13.38
Number Exercisable (in shares) | shares 745
Weighted Average Exercise Price (in dollars per share) $ 13.44
Exercise Price Range, Minimum (in dollars per share) 12.90
Exercise Price Range, Maximum (in dollars per share) $ 16.70
$10.57 - $12.51  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding (in shares) | shares 1,436
Weighted Average Remaining Contractual Term (in years) 2 years 6 months 22 days
Weighted Average Exercise Price (in dollars per share) $ 11.24
Number Exercisable (in shares) | shares 860
Weighted Average Exercise Price (in dollars per share) $ 11.04
Exercise Price Range, Minimum (in dollars per share) 10.57
Exercise Price Range, Maximum (in dollars per share) $ 12.51
$10.00 - $10.00  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding (in shares) | shares 1,380
Weighted Average Remaining Contractual Term (in years) 1 year 4 months 4 days
Weighted Average Exercise Price (in dollars per share) $ 10.00
Number Exercisable (in shares) | shares 1,342
Weighted Average Exercise Price (in dollars per share) $ 10.00
Exercise Price Range, Minimum (in dollars per share) 10.00
Exercise Price Range, Maximum (in dollars per share) $ 10.00
$9.25 - $9.87  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding (in shares) | shares 1,286
Weighted Average Remaining Contractual Term (in years) 2 years 3 months 10 days
Weighted Average Exercise Price (in dollars per share) $ 9.54
Number Exercisable (in shares) | shares 801
Weighted Average Exercise Price (in dollars per share) $ 9.70
Exercise Price Range, Minimum (in dollars per share) 9.25
Exercise Price Range, Maximum (in dollars per share) $ 9.87
$6.18 - $9.21  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number Outstanding (in shares) | shares 1,429
Weighted Average Remaining Contractual Term (in years) 4 years 4 months 24 days
Weighted Average Exercise Price (in dollars per share) $ 8.01
Number Exercisable (in shares) | shares 89
Weighted Average Exercise Price (in dollars per share) $ 8.72
Exercise Price Range, Minimum (in dollars per share) 6.18
Exercise Price Range, Maximum (in dollars per share) $ 9.21