Fair Value Measures - Additional Information (Detail) - USD ($) $ in Thousands |
Mar. 26, 2016 |
Dec. 26, 2015 |
Mar. 28, 2015 |
Dec. 27, 2014 |
|---|---|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||
| Cash and cash equivalents balance | $ 51,128 | $ 94,193 | $ 122,156 | $ 76,402 |
| Money market fund | $ 32,700 | $ 88,100 |