Stock-Based Compensation - Schedule of Stock Option Award at the End of the Period (Detail) - Nonqualified Stock Options [Member] $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 01, 2017 USD ($) $ / shares shares
Unvested stock options: Number of shares
Number of shares, Beginning balance | shares	649,385
Number of Shares, Granted | shares	0
Number of Shares, Vested | shares	(185,567)
Number of Shares, Forfeited | shares	(4,562)
Number of Shares, Ending balance | shares	459,256
Number of Shares, Options expected to vest | shares	431,992
Vested stock options
Number of Shares, Vested | shares	185,567
Number of shares, Vested stock options, Ending balance | shares	185,567
Unvested stock options: Weighted Average Exercise Price
Weighted Average Exercise Price | $ / shares	$ 25.70
Weighted Average Exercise Price, Granted | $ / shares	0
Weighted Average Exercise Price, Vested | $ / shares	25.69
Weighted Average Exercise Price, Forfeited | $ / shares	25.69
Weighted Average Exercise Price, Ending Balance | $ / shares	25.71
Weighted Average Exercise Price, Options expected to vest | $ / shares	25.71
Vested stock options:
Weighted Average Exercise Price, Vested | $ / shares	25.69
Weighted Average Exercise Price, Vested stock options, Ending balance | $ / shares	$ 25.69
Unvested stock options: Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term, Balance outstanding at end of period	9 years 4 months 28 days
Weighted Average Remaining Contractual Term, Options expected to vest	8 years 10 months 6 days
Aggregate Intrinsic Value, Balance outstanding at end of period | $	$ 2,508
Aggregate Intrinsic Value, Options expected to vest | $	$ 2,359