Condensed Consolidated Statements Of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 26, 2020	Jul. 28, 2019	Jul. 26, 2020	Jul. 28, 2019
Net income	$ 16,122	$ 2,192	$ 25,754	$ 14,940
Other comprehensive loss, net:
Unrealized gain on available-for-sale securities	133	0	386	0
Reclassification of realized gain on available-for-sale securities, net to net income	(757)	0	(757)	0
Change in defined benefit plans, net	193	69	379	137
Other comprehensive loss, net	(169)	(122)	(1,175)	(134)
Comprehensive income	15,953	2,070	24,579	14,806
Comprehensive loss attributable to noncontrolling interest	(3)	0
Comprehensive income attributable to common stockholders	15,956	2,070	24,585	14,806
Foreign Exchange Contract
Other comprehensive loss, net:
Unrealized gain (loss), net	479	(229)	358	(280)
Reclassifications of realized (gain) loss	6	38	6	9
Interest Rate Swap
Other comprehensive loss, net:
Unrealized gain (loss), net	(317)	0	(1,620)	0
Reclassifications of realized (gain) loss	$ 94	$ 0	$ 73	$ 0