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Schedule II - Valuation and Qualifying Accounts and Reserves (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Valuation and Qualifying Accounts and Reserves [Table Text Block] |
|  | COLUMN A BALANCE, AT BEGINNING OF YEAR |  |  | COLUMN B CHARGED TO COSTS AND EXPENSES (A) |  |  | COLUMN C CHARGED TO OTHER ACCOUNTS |  |  | COLUMN D DEDUCTIONS (DESCRIBE) (B) |  |  | COLUMN E BALANCE, AT END OF YEAR |
|  | (in thousands) |
Allowance for Doubtful Accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year Ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2017 |  | $ | 3,780 |  |  | $ | 635 |  |  | $ | 0 |  |  | $ | 922 |  |  | $ | 3,493 |
January 1, 2017 |  |  | 4,479 |  |  |  | (243 | ) |  |  | 0 |  |  |  | 456 |  |  |  | 3,780 |
January 3, 2016 |  |  | 5,896 |  |  |  | 212 |  |  |  | 0 |  |  |  | 1,629 |  |  |  | 4,479 |
|  | COLUMN A BALANCE, AT BEGINNING OF YEAR |  |  | COLUMN B CHARGED TO COSTS AND EXPENSES (A) |  |  | COLUMN C CHARGED TO OTHER ACCOUNTS(B) |  |  | COLUMN D DEDUCTIONS (DESCRIBE) (C) |  |  | COLUMN E BALANCE, AT END OF YEAR |
|  | (in thousands) |
Restructuring Reserve: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year Ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2017 |  | $ | 10,291 |  |  | $ | 3,999 |  |  | $ | 3,300 |  |  | $ | 3,724 |  |  | $ | 2,568 |
January 1, 2017 |  |  | 104 |  |  |  | 11,769 |  |  |  | 8,019 |  |  |  | 1,582 |  |  |  | 10,291 |
January 3, 2016 |  |  | 7,179 |  |  |  | (481 | ) |  |  | 0 |  |  |  | 6,594 |  |  |  | 104 |
|  | COLUMN A BALANCE, AT BEGINNING OF YEAR |  |  | COLUMN B CHARGED TO COSTS AND EXPENSES (A) |  |  | COLUMN C CHARGED TO OTHER ACCOUNTS |  |  | COLUMN D DEDUCTIONS (DESCRIBE) (B) |  |  | COLUMN E BALANCE, AT END OF YEAR |
|  | (in thousands) |
Warranty and Sales Allowances Reserves : |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended : |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2017 |  | $ | 5,529 |  |  | $ | 2,071 |  |  | $ | 0 |  |  | $ | 3,489 |  |  | $ | 4,111 |
January 1, 2017 |  |  | 4,759 |  |  |  | 3,149 |  |  |  | 0 |  |  |  | 2,379 |  |  |  | 5,529 |
January 3, 2016 |  |  | 3,954 |  |  |  | 2,584 |  |  |  | 0 |  |  |  | 1,779 |  |  |  | 4,759 |

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