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Schedule II - Valuation and Qualifying Accounts and Reserves - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016 | Jan. 04, 2016 | Dec. 28, 2014
Allowance for Doubtful Accounts [Member] |  |  |  |  |  |
BALANCE, AT BEGINNING OF YEAR |  | $ 3,493 | $ 3,780 | $ 4,479 |  | $ 5,896
CHARGED TO COSTS AND EXPENSES | [1] | 635 | (243) | 212 |  |
CHARGED TO OTHER ACCOUNTS |  | 0 | 0 | 0 |  |
DEDUCTIONS | [2] | 922 | 456 | 1,629 |  |
Business Restructuring Reserves [Member] |  |  |  |  |  |
BALANCE, AT BEGINNING OF YEAR |  | 2,568 | 10,291 | 104 |  | 7,179
CHARGED TO COSTS AND EXPENSES | [1] | 3,999 | 11,769 | (481) |  |
CHARGED TO OTHER ACCOUNTS | [3] | 3,300 | 8,019 | 0 |  |
DEDUCTIONS | [4] | 3,724 | 1,582 | 6,594 |  |
Warranty Reserves [Member] |  |  |  |  |  |
BALANCE, AT BEGINNING OF YEAR |  | 4,111 | 5,529 | 4,759 | $ 4,759 | $ 3,954
CHARGED TO COSTS AND EXPENSES | [1] | 2,071 | 3,149 | 2,584 |  |
CHARGED TO OTHER ACCOUNTS |  | 0 | 0 | 0 |  |
DEDUCTIONS | [5] | $ 3,489 | $ 2,379 | $ 1,779 |  |
[1] | Includes changes in foreign currency exchange rates.
[2] | Write off of bad debt, and recovering of previously provided for amounts.
[3] | Direct reduction of asset carrying value, not included in restructuring reserve.
[4] | Cash payments.
[5] | Represents credits and costs applied against reserve and adjustments to reflect actual exposure.

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- Definition Amount of increase (decrease) in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to accounts other than costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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