CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 25, 2020	Apr. 27, 2019	Apr. 25, 2020	Apr. 27, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 11,152	$ 4,970	$ 15,724	$ 18,810
Other comprehensive income:
Amortization of pension actuarial loss, net of tax	100	102	303	306
Pension settlement loss, net of tax	83	302	954	302
Pension remeasurement, net of tax	323	0	(381)	0
Comprehensive income	$ 11,658	$ 5,374	$ 16,600	$ 19,418