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TRADE ACCOUNTS RECEIVABLE (Tables) | 12 Months Ended
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Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract] |
Schedule of trade accounts receivable | TRADE ACCOUNTS RECEIVABLE:
| December 31, 2017 |  |  | January 1, 2017 |
Trade accounts receivable | $ | 248,419 |  |  | $ | 283,322 |
Allowance for doubtful accounts | (5,054 | ) |  | (5,589 | )
| $ | 243,365 |  |  | $ | 277,733 |
The movement in the allowance for doubtful accounts in respect of trade receivables was as follows:
| December 31, 2017 |  |  | January 1, 2017 |
Balance, beginning of fiscal year | $ | (5,589 | ) |  | $ | (4,601 | )
Bad debt recovery (expense) | (3,689 | ) |  | 92 |
Write-off of trade accounts receivable | 4,224 |  |  | 524 |
Increase due to business acquisitions | — |  |  | (1,604 | )
Balance, end of fiscal year | $ | (5,054 | ) |  | $ | (5,589 | )

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