Fair Value Measures - Additional Information (Detail) - USD ($) $ in Thousands |
Jun. 25, 2016 |
Dec. 26, 2015 |
Jun. 27, 2015 |
Dec. 27, 2014 |
|---|---|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Cash and cash equivalents balance | $ 27,580 | $ 94,193 | $ 146,983 | $ 76,402 |
| Money market fund | $ 26,600 | $ 88,100 |