Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended									12 Months Ended
	Feb. 05, 2021	Apr. 04, 2021	Jan. 03, 2021	Oct. 04, 2020	Jul. 05, 2020	Apr. 05, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Jul. 31, 2020	Jul. 23, 2018
Schedule of Stockholders' Equity [Line Items]
Repurchased Common Shares For Activity Pursuant to Equity Incentive Plans											72,251	68,536	66,506
Aggregate Cost of Repurchased Common Shares for Activity Pursuant to Equity Incentive Plans											$ 6,900	$ 6,300	$ 5,200
Cash dividends (per share)			$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.07	$ 0.28	$ 0.28
Cost of Repurchased Common Shares, Repurchase Plan and Amount for Statutory Tax Withholding Obligations											$ 6,944	$ 6,313	57,393
Dividends accrued			$ 7,900								7,900
Unrecognized prior service (cost) credit, net of tax											(1,799)	807	(77)
Unrecognized prior service credit (cost), net of tax1											(1,800)	$ 800	$ (100)
Repurchase Program, 07/31/2020 [Member]
Schedule of Stockholders' Equity [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount			$ 250,000								$ 250,000
Stock Repurchase Program, Authorized Amount														$ 250,000
Repurchase Program, 07/23/2018 [Member]
Schedule of Stockholders' Equity [Line Items]
Stock Repurchase Program, Authorized Amount															$ 250,000
Subsequent Event [Member]
Schedule of Stockholders' Equity [Line Items]
Cash dividends (per share)		$ 0.07
Dividends Payable, Date Declared		Jan. 28, 2021
Subsequent Event [Member] | Repurchase Program, 07/31/2020 [Member]
Schedule of Stockholders' Equity [Line Items]
Aggregate Cost of Repurchased Common Shares for Activity Pursuant to Equity Incentive Plans	$ 33,600
Number of common stock repurchased in open market	233,000