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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional paid-in capital [Member]
Accumulated other comprehensive income (loss) [Member]
Retained earnings [Member]
Treasury Stock [Member]
Balance at Dec. 30, 2016 $ 273,346 $ 66 $ 194,599 $ (3,126) $ 291,243 $ (209,436)
Balances (in shares) at Dec. 30, 2016   65,707,000       14,512,000
Employee stock purchase plan 1,207   847     $ 360
Employee stock purchase plan (in shares)           (40,000)
Exercise of stock options 818   144     $ 674
Exercise of stock options (in shares)           (69,000)
Amortization of unrecognized stock-based compensation 7,824   7,824      
Purchase of treasury shares (11,931)         $ (11,931)
Purchase of treasury shares (in shares)           372,000
Foreign currency translation adjustments 1,187     1,187    
Grant of restricted stock units to settle accrued bonus 6,918   6,918      
Settlement of restricted stock units (9,520)   (1,017)   (5,667) $ (2,836)
Settlement of restricted stock units (in shares)           (606,000)
Unrealized (loss) gain on investments (90)     (90)    
Dividends and dividend equivalent rights (21,976)   915   (22,891)  
Net income 41,305       41,305  
Balance at Dec. 29, 2017 289,088 $ 66 210,230 (2,029) 303,990 $ (223,169)
Balances (in shares) at Dec. 29, 2017   65,707,000       14,169,000
Employee stock purchase plan 1,474   1,161     $ 313
Employee stock purchase plan (in shares)           (32,000)
Amortization of unrecognized stock-based compensation 8,550   8,550      
Purchase of treasury shares (27,915)         $ (27,915)
Purchase of treasury shares (in shares)           562,000
Foreign currency translation adjustments (1,015)     (1,015)    
Grant of restricted stock units to settle accrued bonus 7,643   7,643      
Settlement of restricted stock units (8,839)   (1,107)   (5,892) $ (1,840)
Settlement of restricted stock units (in shares)           (491,000)
Unrealized (loss) gain on investments 191     191    
Dividends and dividend equivalent rights (27,522)   806   (28,328)  
Net income 72,254       72,254  
Balance at Dec. 28, 2018 313,909 $ 66 227,283 (2,853) 342,024 $ (252,611)
Balances (in shares) at Dec. 28, 2018   65,707,000       14,208,000
Employee stock purchase plan 1,668   1,384     $ 284
Employee stock purchase plan (in shares)           (27,000)
Exercise of stock options $ 1,561   (141)     $ 1,702
Exercise of stock options (in shares) (165,851) [1]         (166,000)
Amortization of unrecognized stock-based compensation $ 8,710   8,710      
Purchase of treasury shares (21,957)         $ (21,957)
Purchase of treasury shares (in shares)           342,000
Foreign currency translation adjustments 145     145    
Reclassification adjustment for currencytranslation adjustments on planneddisposal of a subsidiary 601     601    
Grant of restricted stock units to settle accrued bonus 7,947   7,947      
Settlement of restricted stock units (11,183)   (961)   (5,146) $ (5,076)
Settlement of restricted stock units (in shares)           (406,000)
Unrealized (loss) gain on investments 347     347    
Dividends and dividend equivalent rights (33,957)   713   (34,670)  
Net income 82,460       82,460  
Balance at Jan. 03, 2020 $ 350,251 $ 66 $ 244,935 $ (1,760) $ 384,668 $ (277,658)
Balances (in shares) at Jan. 03, 2020   65,707,000       13,951,000
[1] Does not include restricted stock or employee stock purchase plans.