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Note 10 - Shareholders' Equity - Activity of Shareholders' Equity (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Jan. 01, 2017
Oct. 02, 2016
Jul. 03, 2016
Apr. 03, 2016
Jan. 03, 2016
Oct. 04, 2015
Jul. 05, 2015
Apr. 05, 2015
Jan. 01, 2017
Jan. 03, 2016
Dec. 28, 2014
Balance       $ 342,366         $ 342,366    
Net income $ 4,707 [1] $ 15,904 $ 20,657 $ 12,894 $ 18,247 $ 20,127 $ 21,722 $ 12,322 54,162 $ 72,418 $ 24,808
Pension liability adjustment                 (11,572) 6,072 (15,280)
Foreign currency translation adjustment                 (19,011) (32,575) $ (28,351)
Balance $ 340,729       $ 342,366       340,729 $ 342,366  
Windfall tax benefit - share-based payment awards                 $ 6,300    
Common Stock [Member]                      
Balance (in shares)       65,701       65,968 65,701 65,968 66,311
Balance       $ 6,570       $ 6,597 $ 6,570 $ 6,597 $ 6,631
Net income                 $ 0 $ 0 $ 0
Stock issuances under employee option plans (in shares)                 17 39 55
Stock issuances under employee option plans                 $ 2 $ 4 $ 5
Other issuances of common stock (in shares)                 277 597 489
Other issuances of common stock                 $ 28 $ 59 $ 49
Unamortized stock compensation expense related to restricted stock awards                 0 0 0
Cash dividends paid                 $ 0 $ 0 $ 0
Forfeitures and compensation expense related to stock awards (in shares)                 (579) (253) (387)
Forfeitures and compensation expense related to stock awards                 $ (58) $ (25) $ (38)
Share repurchases (in shares)                 (1,178) (650) (500)
Share repurchases                 $ (118) $ (65) $ (50)
Pension liability adjustment                 0 0 0
Foreign currency translation adjustment                 $ 0 $ 0 $ 0
Other (in shares)                 0 0 0
Other                 $ 0 $ 0 $ 0
Balance (in shares) 64,238       65,701       64,238 65,701 65,968
Balance $ 6,424       $ 6,570       $ 6,424 $ 6,570 $ 6,597
Windfall tax benefit - share-based payment awards                 0    
Additional Paid-in Capital [Member]                      
Balance       370,327       368,603 370,327 368,603 374,597
Net income                 0 0 0
Stock issuances under employee option plans                 251 355 381
Other issuances of common stock                 4,726 9,746 10,361
Unamortized stock compensation expense related to restricted stock awards                 (4,754) (9,806) (10,410)
Cash dividends paid                 0 0 0
Forfeitures and compensation expense related to stock awards                 979 14,670 1,293
Share repurchases                 (18,378) (13,241) (7,619)
Pension liability adjustment                 0 0 0
Foreign currency translation adjustment                 0 0 0
Other                 0 0 0
Balance 359,451       370,327       359,451 370,327 368,603
Windfall tax benefit - share-based payment awards                 6,300    
Retained Earnings [Member]                      
Balance       100,270       39,737 100,270 39,737 24,226
Net income                 54,162 72,418 24,808
Stock issuances under employee option plans                 0 0 0
Other issuances of common stock                 0 0 0
Unamortized stock compensation expense related to restricted stock awards                 0 0 0
Cash dividends paid                 (14,285) (11,885) (9,297)
Forfeitures and compensation expense related to stock awards                 0 0 0
Share repurchases                 0 0 0
Pension liability adjustment                 0 0 0
Foreign currency translation adjustment                 0 0 0
Other                 91 0 0
Balance 140,238       100,270       140,238 100,270 39,737
Windfall tax benefit - share-based payment awards                 0    
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]                      
Balance       (43,290)       (49,362) (43,290) (49,362) (34,082)
Net income                 0 0 0
Stock issuances under employee option plans                 0 0 0
Other issuances of common stock                 0 0 0
Unamortized stock compensation expense related to restricted stock awards                 0 0 0
Cash dividends paid                 0 0 0
Forfeitures and compensation expense related to stock awards                 0 0 0
Share repurchases                 0 0 0
Pension liability adjustment                 (11,572) 6,072 (15,280)
Foreign currency translation adjustment                 0 0 0
Other                 0 0 0
Balance (54,862)       (43,290)       (54,862) (43,290) (49,362)
Windfall tax benefit - share-based payment awards                 0    
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]                      
Balance       $ (91,511)       $ (58,936) (91,511) (58,936) (30,585)
Net income                 0 0 0
Stock issuances under employee option plans                 0 0 0
Other issuances of common stock                 0 0 0
Unamortized stock compensation expense related to restricted stock awards                 0 0 0
Cash dividends paid                 0 0 0
Forfeitures and compensation expense related to stock awards                 0 0 0
Share repurchases                 0 0 0
Pension liability adjustment                 0 0 0
Foreign currency translation adjustment                 (19,011) (32,575) (28,351)
Other                 0 0 0
Balance $ (110,522)       $ (91,511)       (110,522) $ (91,511) $ (58,936)
Windfall tax benefit - share-based payment awards                 $ 0    
[1] Results for the fourth quarter of 2016 include restructuring and asset impairment charges of $19.8 million.