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SUPPLEMENTAL BALANCE SHEET INFORMATION (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 26, 2021 | Dec. 27, 2020 | Dec. 29, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 2,921 | $ 4,288 | $ 5,026
Current period provision | 6,493 | 6,300 | 7,661
Write-offs | (2,713) | (8,181) | (8,358)
Foreign currency translation | (14) | (10) | (41)
Ending balance | 6,687 | 2,921 | 4,288
Prepaid software agreements | 10,078 | 8,643 |
Other prepaid expenses | 8,858 | 8,631 |
Other current assets | 12,678 | 8,863 |
Prepaid expenses and other current assets | 31,614 | 26,137 |
Gross property and equipment | 254,197 | 225,037 |
Less accumulated depreciation | (166,107) | (153,303) |
Property and equipment, net | 88,090 | 71,734 |
Capitalized computer software, net | 29,300 | 27,600 |
Depreciation expense | 20,900 | 21,900 | 19,700
Buildings and land |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Gross property and equipment | 50,444 | 44,479 |
Software |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Gross property and equipment | 139,363 | 127,715 |
Computers, furniture and equipment |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Gross property and equipment | 47,816 | 42,846 |
Construction in progress |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Gross property and equipment | 16,574 | 9,997 |
Cumulative Effect, Period of Adoption, Adjustment |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 0 | 524 | 0
Ending balance |  | $ 0 | $ 524

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