XML 262 R50.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation Plans (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Feb. 15, 2018
shares
Feb. 04, 2017
$ / shares
shares
Feb. 03, 2017
$ / shares
Apr. 20, 2016
$ / shares
shares
Feb. 06, 2013
Dec. 31, 2017
USD ($)
director
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
shares
Feb. 14, 2018
$ / shares
Restricted stock unit activity                  
Number of Non-Employee Directors | director           7      
Aggregate Intrinsic Value                  
Total intrinsic value of stock options exercised (in dollars) | $           $ 4,600 $ 3,100 $ 2,400  
Unrecognized compensation cost and vesting period                  
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $           $ 10,200      
Weighted-average period for recognition of unrecognized stock-based compensation expense           1 year 9 months 18 days      
Other disclosures                  
Stock-based compensation expense recognized in operating expenses | $           $ 12,744 13,113 11,212  
Requisite service period for options to vest           4 years      
Tax benefit of stock-based compensation expense in provision for income taxes | $           $ 4,575 4,757 3,987  
Allocated Share-based Compensation Expense, Net of Tax | $           8,169 8,356 7,225  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $           11,043 13,186 10,997  
Stock-based compensation cost capitalized in inventory | $           200 400    
Issuance of Company’s common stock | $           6,610 7,976 9,720  
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options | $           $ 0 $ 251 $ 318  
Stock Bonus Plan                  
Other disclosures                  
Shares issued and committed to issue | shares           12,000 12,000 10,000  
Stock-based compensation expense recognized in operating expenses | $           $ 1,200 $ 800 $ 700  
Restricted Stock Units                  
Restricted stock unit activity                  
Outstanding at the beginning of the period (in shares) | shares           615,000      
Awarded (in shares) | shares   579,139       589,000      
Vested (in shares) | shares           (336,000)      
Forfeited (in shares) | shares           (172,000)      
Outstanding at the end of the period (in shares) | shares           696,000 615,000    
Outstanding and expected to vest at the end of the period (in shares) | shares           690,000      
Weighted-Average Exercise Price                  
Outstanding at the beginning of the period (in dollars per share)           $ 31.81      
Awarded (in dollars per share)   $ 38.74 $ 43.42 $ 41.52   38.79      
Vested (in dollars per share)           32.85      
Forfeited (in dollars per share)           35.96      
Outstanding at the end of the period (in dollars per share)           35.34 $ 31.81    
Outstanding and expected to vest at the end of the period (in dollars per share)           $ 35.33      
Aggregate Intrinsic Value                  
Outstanding at the end of the period (in dollars) | $           $ 39,976 $ 26,915    
Outstanding and expected to vest at end of the period (in dollars) | $           $ 39,609      
Closing price per share (in dollars per share)           $ 57.41      
Total intrinsic value of awards vested (in dollars) | $           $ 14,700 $ 10,800 10,300  
Weighted-Average Exercise Price                  
Outstanding at the beginning of the period (in dollars per share)           $ 31.81      
Forfeited (in dollars per share)           35.96      
Outstanding at the end of the period (in dollars per share)           $ 35.34 $ 31.81    
Aggregate Intrinsic Value                  
Outstanding at the end of the period (in dollars) | $           $ 39,976 $ 26,915    
Non-Qualified Stock Options                  
Weighted-Average Exercise Price                  
Outstanding at the beginning of the period (in dollars per share)           $ 29.66      
Forfeited (in dollars per share)           0.00      
Outstanding at the end of the period (in dollars per share)           $ 29.66 $ 29.66    
Aggregate Intrinsic Value                  
Outstanding at the end of the period (in dollars) | $           $ 780 $ 3,538    
Total intrinsic value of awards vested (in dollars) | $           $ 0 $ 0 $ 0  
Non-Qualified Stock Options activity                  
Outstanding at the beginning of the period (in shares) | shares           251,000      
Exercised (in shares) | shares           (223,000)      
Forfeited (in shares) | shares           0      
Outstanding at the end of the period (in shares) | shares           28,000 251,000    
Weighted-Average Exercise Price                  
Outstanding at the beginning of the period (in dollars per share)           $ 29.66      
Exercised (in dollars per share)           29.66      
Forfeited (in dollars per share)           0.00      
Outstanding at the end of the period (in dollars per share)           $ 29.66 $ 29.66    
Weighted-Average Remaining Contractual Life                  
Outstanding at the end of the period           1 month 6 days 1 year 1 month 6 days    
Aggregate Intrinsic Value                  
Outstanding at the end of the period (in dollars) | $           $ 780 $ 3,538    
Closing price of share (in dollars per share)           $ 57.41      
Non-Qualified Stock Options | 2011 Plan                  
Stock-Based Compensation                  
Maximum common stock shares that may be issued under plan | shares           16,300,000      
Independent directors | Restricted Stock Units                  
Restricted stock unit activity                  
Awarded (in shares) | shares       10,066          
Independent directors | Restricted Stock Units | Restrictions lapse (awards vest) on date of award                  
Stock-Based Compensation                  
Vesting percent         25.00%        
Independent directors | Restricted Stock Units | Restrictions lapse (awards vest) on first, second and third anniversaries of the date of the award                  
Stock-Based Compensation                  
Vesting percent         25.00%        
Restrictions on awards to certain officers | Restricted Stock Units | Restrictions lapse (awards vest) on the fourth anniversary of the date of the award                  
Stock-Based Compensation                  
Vesting percent         25.00%        
Restrictions on awards to certain officers | Restricted Stock Units | Restrictions lapse (awards vest) on the third anniversary of the date of the award                  
Stock-Based Compensation                  
Vesting percent         100.00%        
Foreign employees                  
Other disclosures                  
Shares issued and committed to issue | shares           8,100      
Shares expected to be settled In cash | shares           3,900      
Subsequent Event                  
Aggregate Intrinsic Value                  
Closing price per share (in dollars per share)                 $ 57.16
Subsequent Event | Restricted Stock Units                  
Restricted stock unit activity                  
Awarded (in shares) | shares 186,000