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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock Outstanding [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Treasury Stock, At Cost [Member]
Beginning Balance at Dec. 28, 2014 $ 195,004   $ 245 $ 110,707 $ 112,521 $ (28,469)
Beginning Balance, Shares at Dec. 28, 2014   22,180,458        
Net income 15,297       15,297  
Dividends on common stock (8,820)       (8,820)  
Issuance of nonvested share awards     2 (2)    
Issuance of nonvested share awards, Shares   152,140        
Exercise of share option awards 147     147    
Exercise of share option awards, Shares   25,875        
Share-based compensation 2,235     2,235    
Tax deficiency from share-based awards activity (167)     (167)    
Forfeiture of nonvested share awards, Shares   (7,940)        
Retirement of common stock for payment of withholding tax (685)   (1) (684)    
Retirement of common stock for payment of withholding tax, Shares   (52,621)        
Purchases of treasury stock (4,180)         (4,180)
Purchases of treasury stock, Shares   (379,930)        
Ending Balance at Jan. 03, 2016 198,831   246 112,236 118,998 (32,649)
Ending Balance, shares at Jan. 03, 2016   21,917,982        
Net income 16,886       16,886  
Dividends on common stock (11,521)       (11,521)  
Issuance of nonvested share awards     2 (2)    
Issuance of nonvested share awards, Shares   166,980        
Exercise of share option awards 1,079   1 1,078    
Exercise of share option awards, Shares   137,161        
Share-based compensation 2,319     2,319    
Tax deficiency from share-based awards activity (222)     (222)    
Forfeiture of nonvested share awards, Shares   (21,860)        
Retirement of common stock for payment of withholding tax (613)   (1) (612)    
Retirement of common stock for payment of withholding tax, Shares   (53,682)        
Shares withheld for exercise of share option awards (112)         (112)
Shares withheld for exercise of share option awards, Shares   (7,031)        
Purchases of treasury stock (1,610)         (1,610)
Purchases of treasury stock, Shares   (126,899)        
Ending Balance at Jan. 01, 2017 205,037   248 114,797 124,363 (34,371)
Ending Balance, shares at Jan. 01, 2017   22,012,651        
Net income 1,104       1,104  
Dividends on common stock (13,043)       (13,043)  
Issuance of nonvested share awards     2 (2)    
Issuance of nonvested share awards, Shares   203,112        
Exercise of share option awards $ 67     67    
Exercise of share option awards, Shares 11,086 11,086        
Share-based compensation $ 2,301     2,301    
Forfeiture of nonvested share awards, Shares   (31,960)        
Retirement of common stock for payment of withholding tax $ (805)   (1) (804)    
Retirement of common stock for payment of withholding tax, Shares (54,012) (54,012)        
Net disgorgement of stockholder's short-swing profits $ 136     136    
Purchases of treasury stock (7,728)         (7,728)
Purchases of treasury stock, Shares   (795,718)        
Ending Balance at Dec. 31, 2017 $ 187,069   $ 249 $ 116,495 $ 112,424 $ (42,099)
Ending Balance, shares at Dec. 31, 2017   21,345,159