Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	4 Months Ended
	Jan. 21, 2018	Jan. 22, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 12,190	$ 35,930
Net change in fair value of derivatives	10,291	23,086
Net loss reclassified to earnings	1,674	2,066
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	11,965	25,152
Tax effect	(3,039)	(9,731)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	8,926	15,421
Actuarial losses and prior service costs reclassified to earnings	1,535	1,978
Tax effect	(542)	(766)
Unrecognized periodic benefit costs	993	1,212
Other comprehensive income, net of tax	9,919	16,633
Comprehensive income	$ 22,109	$ 52,563