Valuation Reserves (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 29, 2017 |
Dec. 30, 2016 |
Dec. 25, 2015 |
|
| Allowance for doubtful accounts | |||
| Movement in Valuation Allowances and Reserves [Roll Forward] | |||
| Balance at Beginning of Period | $ 6,848 | $ 5,803 | $ 4,675 |
| Additions Charged to Expense | 4,061 | 3,224 | 2,909 |
| Deductions | (2,883) | (2,179) | (1,781) |
| Balance at End of Period | 8,026 | 6,848 | 5,803 |
| Inventory valuation reserve | |||
| Movement in Valuation Allowances and Reserves [Roll Forward] | |||
| Balance at Beginning of Period | 2,122 | 1,956 | 1,130 |
| Additions Charged to Expense | 2,996 | 3,043 | 3,288 |
| Deductions | (3,184) | (2,877) | (2,462) |
| Balance at End of Period | 1,934 | 2,122 | 1,956 |
| Allowance for deferred tax assets | |||
| Movement in Valuation Allowances and Reserves [Roll Forward] | |||
| Balance at Beginning of Period | 0 | 0 | 0 |
| Additions Charged to Expense | 289 | 0 | 0 |
| Deductions | 0 | 0 | 0 |
| Balance at End of Period | $ 289 | $ 0 | $ 0 |