CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Millions	Class A Common Stock	Class B Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss.	Total
Balance at the beginning of the period at Dec. 31, 2022	$ 2.7	$ 0.6	$ 651.9	$ 795.3	$ (149.9)	$ 1,300.6
Balance (in shares) at Dec. 31, 2022	27,314,679	5,958,290
Increase (Decrease) in Stockholders' Equity
Net income				140.6		140.6
Other comprehensive income (loss)					7.0	7.0
Comprehensive income						147.6
Shares of Class A common stock issued upon the exercise of stock options			0.1			0.1
Shares of Class A common stock issued upon the exercise of stock options (in shares)	598
Stock-based compensation			9.5			9.5
Stock repurchase				(7.7)		(7.7)
Stock repurchase (in shares)	(46,556)
Net change in restricted and performance stock units			2.1	(15.6)		(13.5)
Net change in restricted and performance stock units (in shares)	119,702
Common stock dividends				(22.3)		(22.3)
Balance at the end of the period at Jun. 25, 2023	$ 2.7	$ 0.6	663.6	890.3	(142.9)	1,414.3
Balance (in shares) at Jun. 25, 2023	27,388,423	5,958,290
Balance at the beginning of the period at Mar. 26, 2023	$ 2.7	$ 0.6	658.1	831.6	(147.2)	1,345.8
Balance (in shares) at Mar. 26, 2023	27,414,400	5,958,290
Increase (Decrease) in Stockholders' Equity
Net income				75.9		75.9
Other comprehensive income (loss)					4.3	4.3
Comprehensive income						80.2
Shares of Class A common stock issued upon the exercise of stock options (in shares)	51
Stock-based compensation			5.5			5.5
Stock repurchase				(4.0)		(4.0)
Stock repurchase (in shares)	(24,083)
Net change in restricted and performance stock units				(1.0)		(1.0)
Net change in restricted and performance stock units (in shares)	(1,945)
Common stock dividends				(12.2)		(12.2)
Balance at the end of the period at Jun. 25, 2023	$ 2.7	$ 0.6	663.6	890.3	(142.9)	1,414.3
Balance (in shares) at Jun. 25, 2023	27,388,423	5,958,290
Balance at the beginning of the period at Dec. 31, 2023	$ 2.7	$ 0.6	674.3	979.1	(143.4)	1,513.3
Balance (in shares) at Dec. 31, 2023	27,352,701	5,958,290
Increase (Decrease) in Stockholders' Equity
Net income				154.5		154.5
Other comprehensive income (loss)					(14.3)	(14.3)
Comprehensive income						140.2
Shares of Class B common stock converted to Class A common stock (in shares)	5,000	(5,000)
Shares of Class A common stock issued upon the exercise of stock options (in shares)	364
Stock-based compensation			10.0			10.0
Stock repurchase				(8.1)		(8.1)
Stock repurchase (in shares)	(40,012)
Net change in restricted and performance stock units			2.3	(12.8)		(10.5)
Net change in restricted and performance stock units (in shares)	86,037
Common stock dividends				(26.7)		(26.7)
Balance at the end of the period at Jun. 30, 2024	$ 2.7	$ 0.6	686.6	1,086.0	(157.7)	1,618.2
Balance (in shares) at Jun. 30, 2024	27,404,090	5,953,290
Balance at the beginning of the period at Mar. 31, 2024	$ 2.7	$ 0.6	680.6	1,022.8	(154.9)	1,551.8
Balance (in shares) at Mar. 31, 2024	27,418,449	5,958,290
Increase (Decrease) in Stockholders' Equity
Net income				82.0		82.0
Other comprehensive income (loss)					(2.8)	(2.8)
Comprehensive income						79.2
Shares of Class B common stock converted to Class A common stock (in shares)	5,000	(5,000)
Shares of Class A common stock issued upon the exercise of stock options (in shares)	364
Stock-based compensation			6.0			6.0
Stock repurchase				(4.1)		(4.1)
Stock repurchase (in shares)	(20,262)
Net change in restricted and performance stock units				(0.1)		(0.1)
Net change in restricted and performance stock units (in shares)	539
Common stock dividends				(14.6)		(14.6)
Balance at the end of the period at Jun. 30, 2024	$ 2.7	$ 0.6	$ 686.6	$ 1,086.0	$ (157.7)	$ 1,618.2
Balance (in shares) at Jun. 30, 2024	27,404,090	5,953,290