Income Taxes - Components of Changes in Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 30, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Unrecognized tax benefits - beginning balance | $ 2,060 | $ 374 | $ 435 |
| Gross increases - tax positions in current period | 0 | 1,676 | 0 |
| Gross increases - tax positions in prior period | 0 | 10 | 0 |
| Gross decreases - tax positions in prior period | (959) | 0 | (61) |
| Unrecognized tax benefits - ending balance | 1,101 | 2,060 | 374 |
| Amount of unrecognized tax benefit that, if recognized would affect the Company's effective tax rate | 1,101 | $ 2,060 | $ 374 |
| Successor [Member] | |||
| Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions, Excluding Items Previously Recognized by Acquired Company | $ 959 | ||