Earnings per Share and Stock Repurchase Program (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 28, 2021 USD ($) $ / shares shares	Mar. 29, 2020 USD ($) $ / shares shares	Dec. 31, 2020	Feb. 06, 2019 USD ($)	Jul. 31, 2015 USD ($)
Net (loss) income
Net income | $	$ 41.7	$ 32.0
Shares
Shares (in shares) | shares	33,800,000	34,000,000.0
Per Share Amount
Net income (in dollars per share) | $ / shares	$ 1.23	$ 0.94
Dilutive securities, principally common stock options
Common stock equivalents (in shares) | shares	100,000	100,000
Net (loss) income
Net income | $	$ 41.7	$ 32.0
Weighted average number of shares:
Shares (in shares) | shares	33,900,000	34,100,000
Securities not included in the computation of diluted EPS
Net income (in dollars per share) | $ / shares	$ 1.23	$ 0.94
Dilutive securities, principally common stock options
Options to purchase shares of Class A common stock, anti-dilutive | shares	0	0
Shares repurchased
Number of shares repurchased | shares	31,153	174,707
Cost of shares repurchased | $	$ 3.8	$ 14.7
Class A
Common Stock
Common Stock, votes per share (Number of votes)	1		1
Class B
Common Stock
Common Stock, votes per share (Number of votes)	10		10
February 6, 2019
Shares repurchased
Number of shares repurchased | shares	31,153	174,707
Cost of shares repurchased | $	$ 3.8	$ 14.7
February 6, 2019 | Class A
Shares repurchased
Value of shares of the entity's Class A common stock authorized to be repurchased | $				$ 150.0	$ 150.0
Remaining authorized repurchase amount | $	$ 109.6