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Stock Based Compensation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021	Dec. 27, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuance	1,162,406
Stock options exercised	$ 2,400
Intrinsic value exercised	46,100,000
Share based compensation	$ 10,122,000	$ 9,740,000	$ 7,716,000
Stock Appreciation Rights (SARs) And Stock Options [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period	4 years
Stock Appreciation Rights (SARs) And Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period	10 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, vesting schedules options one	4 years
Percentage of vesting on restricted stock, option one, Second anniversary	50.00%
Percentage of vesting on restricted stock, option one, Third anniversary	25.00%
Percentage of vesting on restricted stock, option one, Fourth anniversary	25.00%
Restricted stock units, vesting schedules options two	4 years
Percentage of vesting on restricted stock, option two, First anniversary	25.00%
Percentage of vesting on restricted stock, option two, Second anniversary	25.00%
Percentage of vesting on restricted stock, option two, Third anniversary	25.00%
Percentage of vesting on restricted stock, option two, Fourth anniversary	25.00%
Restricted stock units, vesting schedules options three	3 years
Percentage of vesting on restricted stock, option three, First anniversary	33.00%
Percentage of vesting on restricted stock, option three, Second anniversary	33.00%
Percentage of vesting on restricted stock, option three, Third anniversary	33.00%
Restricted stock units, vesting schedules options four	1 year
Percentage of vesting on restricted stock, option four, First anniversary	100.00%
Share based compensation	$ 9,700,000	8,700,000	6,800,000
Compensation expense related to unvested restricted stock unit based awards	$ 9,200,000
Weighted average period, Restricted stock units	2 years 2 months 12 days
Common Stock Subject to Vesting Requirements [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period	4 years
Share based compensation	$ 400,000	$ 1,100,000	1,000,000.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid			$ 1,000,000.0
Compensation expense related to common stock subject to vesting requirements	$ 27,000,000
Weighted average period, Common stock	1 year 9 months 18 days
Common Stock Subject to Vesting Requirements [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period			4 years

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