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Options and Awards - Options Outstanding by Exercise Price (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Number Outstanding (in shares) 4,428
Black-Scholes Fair Value | $ $ 34,517
Stock Options Vested and Exercisable (in shares) 2,557
2010  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 4.04
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 4.20
Number Outstanding (in shares) 40
Black-Scholes Fair Value | $ $ 82
Remaining Contractual Life (Years) 1 year
Stock Options Vested and Exercisable (in shares) 40
2011  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 5.00
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 6.77
Number Outstanding (in shares) 77
Black-Scholes Fair Value | $ $ 148
Remaining Contractual Life (Years) 2 years
Stock Options Vested and Exercisable (in shares) 77
2012  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 5.56
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 6.75
Number Outstanding (in shares) 210
Black-Scholes Fair Value | $ $ 654
Remaining Contractual Life (Years) 3 years
Stock Options Vested and Exercisable (in shares) 210
2013  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 6.76
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 9.74
Number Outstanding (in shares) 360
Black-Scholes Fair Value | $ $ 1,480
Remaining Contractual Life (Years) 4 years
Stock Options Vested and Exercisable (in shares) 360
2014  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 8.94
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 16.05
Number Outstanding (in shares) 1,024
Black-Scholes Fair Value | $ $ 4,906
Remaining Contractual Life (Years) 5 years
Stock Options Vested and Exercisable (in shares) 1,024
2015  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 18.20
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 21.39
Number Outstanding (in shares) 452
Black-Scholes Fair Value | $ $ 3,490
Remaining Contractual Life (Years) 6 years
Stock Options Vested and Exercisable (in shares) 344
2016  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 18.79
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 19.89
Number Outstanding (in shares) 381
Black-Scholes Fair Value | $ $ 2,254
Remaining Contractual Life (Years) 7 years
Stock Options Vested and Exercisable (in shares) 212
2017  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 15.80
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 22.90
Number Outstanding (in shares) 448
Black-Scholes Fair Value | $ $ 2,649
Remaining Contractual Life (Years) 8 years
Stock Options Vested and Exercisable (in shares) 161
2018  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 22.49
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 32.71
Number Outstanding (in shares) 675
Black-Scholes Fair Value | $ $ 6,907
Remaining Contractual Life (Years) 9 years
Stock Options Vested and Exercisable (in shares) 129
2019  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit (in dollars per share) | $ / shares $ 43.59
Exercise Price, Upper Range Limit (in dollars per share) | $ / shares $ 45.76
Number Outstanding (in shares) 761
Black-Scholes Fair Value | $ $ 11,947
Remaining Contractual Life (Years) 10 years
Stock Options Vested and Exercisable (in shares) 0