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Stock-Based Compensation - Exercise Price Range (Details) - Stock options and SARs
shares in Thousands
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding (in shares) | shares 6,298
Outstanding, Weighted- Average Remaining Contractual Life 2 years 3 months 29 days
Outstanding, Weighted- Average Exercise Price (in usd per share) $ 18.84
Number Exercisable (in shares) | shares 4,906
Exercisable, Weighted- Average Exercise Price (in usd per share) $ 17.66
$8.24 - $8.25  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices, Lower Range (in usd per share) 8.24
Range of Exercise Prices, Upper Range (in usd per share) $ 8.25
Outstanding (in shares) | shares 697
Outstanding, Weighted- Average Remaining Contractual Life 11 months 15 days
Outstanding, Weighted- Average Exercise Price (in usd per share) $ 8.24
Number Exercisable (in shares) | shares 697
Exercisable, Weighted- Average Exercise Price (in usd per share) $ 8.24
$11.65 - $11.65  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices, Lower Range (in usd per share) 11.65
Range of Exercise Prices, Upper Range (in usd per share) $ 11.65
Outstanding (in shares) | shares 1,700
Outstanding, Weighted- Average Remaining Contractual Life 1 year 6 months 4 days
Outstanding, Weighted- Average Exercise Price (in usd per share) $ 11.65
Number Exercisable (in shares) | shares 1,700
Exercisable, Weighted- Average Exercise Price (in usd per share) $ 11.65
$14.45 - $14.45  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices, Lower Range (in usd per share) 14.45
Range of Exercise Prices, Upper Range (in usd per share) $ 14.45
Outstanding (in shares) | shares 58
Outstanding, Weighted- Average Remaining Contractual Life 1 year 8 months 23 days
Outstanding, Weighted- Average Exercise Price (in usd per share) $ 14.45
Number Exercisable (in shares) | shares 0
Exercisable, Weighted- Average Exercise Price (in usd per share) $ 0.00
$22.50 - $22.50  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices, Lower Range (in usd per share) 22.50
Range of Exercise Prices, Upper Range (in usd per share) $ 22.50
Outstanding (in shares) | shares 1,700
Outstanding, Weighted- Average Remaining Contractual Life 1 year 6 months 4 days
Outstanding, Weighted- Average Exercise Price (in usd per share) $ 22.50
Number Exercisable (in shares) | shares 1,700
Exercisable, Weighted- Average Exercise Price (in usd per share) $ 22.50
$23.35 - $53.91  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Range of Exercise Prices, Lower Range (in usd per share) 23.35
Range of Exercise Prices, Upper Range (in usd per share) $ 53.91
Outstanding (in shares) | shares 2,143
Outstanding, Weighted- Average Remaining Contractual Life 4 years 29 days
Outstanding, Weighted- Average Exercise Price (in usd per share) $ 25.20
Number Exercisable (in shares) | shares 809
Exercisable, Weighted- Average Exercise Price (in usd per share) $ 28.25