XML 75 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1
Shareholders' Equity - Summary of Information about Stock Options Outstanding (Detail)
shares in Thousands
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit $ 9.64
Exercise Price, Upper Range Limit $ 30.50
Number Outstanding | shares 515
Remaining Contractual Life (Years), Outstanding 5 years 4 months 13 days
Weighted Average Price, Outstanding $ 25.13
Number Exercisable | shares 331
Remaining Contractual Life (Years), Exercisable 3 years
Weighted Average Price, Exercisable $ 22.16
Exercise Price $9.64 - $9.91 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit 9.64
Exercise Price, Upper Range Limit $ 9.91
Number Outstanding | shares 64
Remaining Contractual Life (Years), Outstanding 11 months 19 days
Weighted Average Price, Outstanding $ 9.71
Number Exercisable | shares 64
Remaining Contractual Life (Years), Exercisable 11 months 19 days
Weighted Average Price, Exercisable $ 9.71
Exercise Price $14.99 - $18.01 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit 14.99
Exercise Price, Upper Range Limit $ 18.01
Number Outstanding | shares 76
Remaining Contractual Life (Years), Outstanding 2 years 1 month 9 days
Weighted Average Price, Outstanding $ 15.89
Number Exercisable | shares 76
Remaining Contractual Life (Years), Exercisable 2 years 1 month 9 days
Weighted Average Price, Exercisable $ 15.89
Exercise Price $27.61 - $30.50 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise Price, Lower Range Limit 27.61
Exercise Price, Upper Range Limit $ 30.50
Number Outstanding | shares 375
Remaining Contractual Life (Years), Outstanding 6 years 9 months 14 days
Weighted Average Price, Outstanding $ 29.63
Number Exercisable | shares 191
Remaining Contractual Life (Years), Exercisable 4 years 10 days
Weighted Average Price, Exercisable $ 28.80