Accumulated Other Comprehensive Loss - Reclassified Items (Details) - USD ($) $ in Thousands	4 Months Ended		9 Months Ended
	Oct. 07, 2018	Oct. 08, 2017	Oct. 07, 2018	Oct. 08, 2017
Items reclassified out of each component of AOCL and the related tax effects
Total before income taxes	$ 9,960	$ 7,711	$ 9,972	$ 8,061
Income tax (provision) benefit	200	(2,605)	(305)	(419)
Net income	$ 10,160	$ 5,106	9,667	$ 7,642
Cash Flow Hedging Activity
Items reclassified out of each component of AOCL and the related tax effects
Total reclassifications, net of tax			15
Cash Flow Hedging Activity | Amount Reclassified from AOCL | Swap
Items reclassified out of each component of AOCL and the related tax effects
Interest income (expense)			21
Total before income taxes			21
Income tax (provision) benefit			(6)
Net income			$ 15