Common Stock and Treasury Stock (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($) item director shares	Mar. 31, 2024 shares
Common Stock
Number of board of directors | director	7
Class A Common Stock
Common Stock
Number of votes per share of common stock | item	1
Percentage of directors to be elected	25.00%
Class A Common Stock | Former Shareholder
Common Stock
Conversion of shares	1
Class A Common Stock | Stock Buy-Back Program
Common Stock
Share repurchase program, authorized amount | $	$ 75.8
Stock repurchase program, remaining authorization amount | $	$ 17.7
Stock repurchased during period shares	0	0
Class B Common Stock
Common Stock
Number of votes per share of common stock | item	10
Class B Common Stock | Former Shareholder
Common Stock
Common stock, shares issued (in shares)	0
Common stock, shares outstanding (in shares)	0