Common Stock and Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

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)
Outstanding at December 25, 2021		221,354		$	310.38
Granted		20,924			378.55
Exercised		(30,164	)		188.46
Cancelled/Forfeited		(7,869	)		339.25
Outstanding at December 31, 2022		204,245		$	334.26		5.25	$	15,378
Exercisable at December 31, 2022		118,829		$	251.08		4.46	$	11,561
Vested and expected to vest at December 31, 2022		174,154		$	319.56		4.83	$	14,653

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:

	2022		2021		2020
	(in thousands)
Amounts included in advertising, promotional, and    selling expenses	$	5,184	$	5,612	$	4,467
Amounts included in general and administrative    expenses		8,804		13,003		10,815
Total stock-based compensation expense	$	13,988	$	18,615	$	15,282
Amounts related to performance-based stock awards    included in total stock-based compensation expense	$	1,524	$	3,384	$	2,771

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 are as follows:

	2022			2021			2020
Expected volatility		38.0	%		36.1	%		32.6	%
Risk-free interest rate		2.11	%		1.45	%		1.09	%
Expected dividends		0	%		0	%		0	%
Exercise factor	3.0 times			2.6 times			2.1 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 25, 2021		88,848		$	401.70
Granted		43,589			346.09
Vested		(32,476	)		292.27
Forfeited		(8,750	)		504.81
Non-vested at December 31, 2022		91,211		$	423.60