Common Stock and Share-Based Compensation (Tables)

12 Months Ended

Dec. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock Options under Equity Plan and Non-Employee Director Plan

Information related to stock options under the Equity Plan and the Non-Employee Director Plan is summarized as follows:

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term in Years		Aggregate Intrinsic Value (in thousands)
Vested and expected to vest at December 31, 2022		204,245		$	334.26
Granted		60,995			326.17
Exercised		(50,211	)		200.62
Cancelled/Forfeited		(5,756	)		396.86
Expired		(1,463	)		464.33
Outstanding at December 30, 2023		207,810		$	361.53		6.14	$	11,419
Exercisable at December 30, 2023		110,193		$	288.62		4.23	$	9,830
Vested and expected to vest at December 30, 2023		175,897		$	350.85		5.75	$	11,101

Stock-Based Compensation Expense Included in Operating Expenses

The following table provides information regarding stock-based compensation expense included in operating expenses in the accompanying consolidated statements of comprehensive income:

	2023		2022		2021
	(in thousands)
Amounts included in general and administrative    expenses	$	10,370	$	8,804	$	13,003
Amounts included in advertising, promotional, and    selling expenses		6,601		5,184		5,612
Total stock-based compensation expense	$	16,971	$	13,988	$	18,615
Amounts related to performance-based stock awards    included in total stock-based compensation expense	$	2,518	$	1,198	$	3,384

Weighted Average Assumptions used to Estimate Fair Value of Stock Options

Weighted average assumptions used to estimate fair values of stock options on the date of grants fir fiscal 2023, 2022, and 2021 was as follows:

	2023			2022			2021
Expected volatility		39.7	%		38.0	%		36.1	%
Risk-free interest rate		3.96	%		2.11	%		1.45	%
Expected dividends		0	%		0	%		0	%
Exercise factor	2.3 times			3.0 times			2.6 times
Discount for post-vesting restrictions		0.0	%		0.0	%		0.0	%

Summary of Vesting Activities of Shares Issued Under Investment Share Program and Restricted Stock Awards

The following table summarizes vesting activities of shares issued under the investment share program and restricted stock awards:

	Number of Shares			Weighted Average Fair Value
Non-vested at December 31, 2022		91,211		$	423.60
Granted		65,920			306.04
Vested		(27,640	)		341.57
Forfeited		(14,694	)		358.43
Non-vested at December 30, 2023		114,797		$	373.56