Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary of Fair Value of Derivative Instruments

	As of September 30, 2018			As of December 31, 2017
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Derivatives designated as    hedging instruments
Interest rate swaps	Other Current Assets    and Other Assets	$	6,159	Other Accrued Liabilities    and Long-term Liabilities	$	1,064

Summary of Gains and Losses of Derivative Instruments

	Thirteen Weeks Ended				Thirty-nine Weeks Ended
	September 30, 2018		October 1, 2017		September 30, 2018		October 1, 2017
Consolidated Statements of    Income Classification
Interest income (expense), net	$	176	$	—	$	115	$	—