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Note 7 - Shareholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2019
Notes Tables |
Schedule of Stockholders Equity [Table Text Block] |
|  | SHARES |  |  | AMOUNT |  |  | ADDITIONAL PAID-IN CAPITAL |  |  | RETAINED EARNINGS |  |  | PENSION LIABILITY |  |  | FOREIGN CURRENCY TRANSLATION ADJUSTMENT |  |  | CASH FLOW HEDGE |
|  | (I n thousands) |  |  |  |  |
Balance, at December 30, 2018 |  |  | 59,508 |  |  | $ | 5,951 |  |  | $ | 270,269 |  |  | $ | 222,214 |  |  | $ | (43,610 | ) |  | $ | (101,487 | ) |  | $ | 1,326 |
Net income |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 7,059 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Stock issuances under employee plans |  |  | 509 |  |  |  | 51 |  |  |  | 379 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Other issuances of common stock |  |  | 224 |  |  |  | 22 |  |  |  | 3,900 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Unamortized stock compensation expense related to restricted stock awards |  |  | 0 |  |  |  | 0 |  |  |  | (3,922 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Cash dividends paid |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (3,900 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Forfeitures and compensation expense related to stock awards |  |  | (225 | ) |  |  | (22 | ) |  |  | 29 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Share repurchases |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Pension liability adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (91 | ) |  |  | 0 |  |  |  | 0 |
Foreign currency translation adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (5,203 | ) |  |  | 0 |
Cash flow hedge unrealized loss |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (3,306 | )
Balance, at March 31, 2019 |  |  | 60,016 |  |  | $ | 6,002 |  |  | $ | 270,655 |  |  | $ | 225,373 |  |  | $ | (43,701 | ) |  | $ | (106,690 | ) |  | $ | (1,980 | )
Net income |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 29,499 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Stock issuances under employee plans |  |  | 2 |  |  |  | 0 |  |  |  | 6 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Other issuances of common stock |  |  | (1 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Unamortized stock compensation expense related to restricted stock awards |  |  | 0 |  |  |  | 0 |  |  |  | 52 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Cash dividends paid |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (3,863 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Forfeitures and compensation expense related to stock awards |  |  | (28 | ) |  |  | (3 | ) |  |  | 1,506 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Share repurchases |  |  | (1,556 | ) |  |  | (156 | ) |  |  | (24,998 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Pension liability adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 829 |  |  |  | 0 |  |  |  | 0 |
Foreign currency translation adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 4,249 |  |  |  | 0 |
Cash flow hedge unrealized gain |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (4,667 | )
Balance, at June 30, 2019 |  |  | 58,433 |  |  | $ | 5,843 |  |  | $ | 247,221 |  |  | $ | 251,009 |  |  | $ | (42,872 | ) |  | $ | (102,441 | ) |  | $ | (6,647 | )
|  | SHARES |  |  | AMOUNT |  |  | ADDITIONAL PAID-IN CAPITAL |  |  | RETAINED EARNINGS |  |  | PENSION LIABILITY |  |  | FOREIGN CURRENCY TRANSLATION ADJUSTMENT |  |  | CASH FLOW HEDGE |
|  | (I n thousands) |  |  |  |  |
Balance, at December 31, 2017 |  |  | 59,806 |  |  | $ | 5,981 |  |  | $ | 271,271 |  |  | $ | 187,433 |  |  | $ | (56,554 | ) |  | $ | (78,943 | ) |  | $ | 904 |
Net income |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 15,084 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Stock issuances under employee plans |  |  | 175 |  |  |  | 17 |  |  |  | 102 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Other issuances of common stock |  |  | 187 |  |  |  | 19 |  |  |  | 4,769 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Unamortized stock compensation expense related to restricted stock awards |  |  | 0 |  |  |  | 0 |  |  |  | (4,788 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Cash dividends paid |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (3,868 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Forfeitures and compensation expense related to stock awards |  |  | (55 | ) |  |  | (6 | ) |  |  | 3,185 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Share repurchases |  |  | (615 | ) |  |  | (61 | ) |  |  | (14,424 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Pension liability adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (2,216 | ) |  |  | 0 |  |  |  | 0 |
Foreign currency translation adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 8,830 |  |  |  | 0 |
Cash flow hedge unrealized loss |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 1,632 |
Balance, at April 1, 2018 |  |  | 59,498 |  |  | $ | 5,950 |  |  | $ | 260,115 |  |  | $ | 198,649 |  |  | $ | (58,770 | ) |  | $ | (70,113 | ) |  | $ | 2,536 |
Net income |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 20,602 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Stock issuances under employee plans |  |  | 4 |  |  |  | 0 |  |  |  | 35 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Other issuances of common stock |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Unamortized stock compensation expense related to restricted stock awards |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Cash dividends paid |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (3,868 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Forfeitures and compensation expense related to stock awards |  |  | (9 | ) |  |  | (1 | ) |  |  | 2,135 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Share repurchases |  |  | (0 | ) |  |  | (0 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
Pension liability adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 3,459 |  |  |  | 0 |  |  |  | 0 |
Foreign currency translation adjustment |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | (20,773 | ) |  |  | 0 |
Cash flow hedge unrealized gain |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 0 |  |  |  | 647 |
Balance, at July 1, 2018 |  |  | 59,493 |  |  | $ | 5,949 |  |  | $ | 262,285 |  |  | $ | 215,383 |  |  | $ | (55,311 | ) |  | $ | (90,886 | ) |  | $ | 3,183 |
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | Restricted Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at December 30, 2018 |  |  | 549,000 |  |  | $ | 27.65 |
Granted |  |  | 224,000 |  |  |  | 17.54 |
Vested |  |  | (211,000 | ) |  |  | 18.30 |
Forfeited or canceled |  |  | (37,000 | ) |  |  | 20.87 |
Outstanding at June 30, 2019 |  |  | 525,000 |  |  | $ | 27.57 |
Schedule of Nonvested Performance-based Units Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at December 30, 2018 |  |  | 759,500 |  |  | $ | 20.17 |
Granted |  |  | 344,500 |  |  |  | 17.54 |
Vested |  |  | (472,000 | ) |  |  | 18.85 |
Forfeited or canceled |  |  | (57,000 | ) |  |  | 20.42 |
Outstanding at June 30, 2019 |  |  | 575,000 |  |  | $ | 19.65 |

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