Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 30, 2017
Income Tax Contingency [Line Items]
Net unrecognized tax benefits	$ 2,400
Unrecognized tax benefits which would impact effective tax rate if recognized	2,000
Accrued interest related to uncertain tax positions	700
Net tax expense due to TCJA		$ 4,400
Adjustment to provisional expense due to TCJA	$ 0
Earliest Tax Year [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Income tax years under examination	2011
Latest Tax Year [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Income tax years under examination	2012