Common Stock and Treasury Stock - (Narrative) (Details) $ / shares in Units, $ in Millions								3 Months Ended		6 Months Ended		12 Months Ended
	May 09, 2023 $ / shares	Mar. 01, 2023 $ / shares	Dec. 07, 2022 $ / shares	Sep. 20, 2022 $ / shares	Aug. 19, 2022 item director shares	Jun. 06, 2022 $ / shares	Mar. 01, 2022 $ / shares	Jun. 30, 2023 USD ($) director $ / shares shares	Jun. 30, 2022 $ / shares shares	Jun. 30, 2023 USD ($) item director $ / shares shares	Jun. 30, 2022 $ / shares shares	Dec. 31, 2022 director shares
Common Stock [Line Items]
Dividends declared per share								$ 0.25	$ 0.20	$ 0.50	$ 0.36
Cash dividend paid										$ 0
Number of board of directors | director								8		8		8
Former Shareholder
Common Stock [Line Items]
Percentage of voting interest held					65.00%
Number of votes per share of common stock | item					10
Dividends declared per share										$ 0
Class A Common Stock
Common Stock [Line Items]
Number of votes per share of common stock | item										1
Conversion of shares | shares												965,000
Dividends declared per share	$ 0.25	$ 0.25	$ 0.25	$ 0.25		$ 0.20	$ 0.16
Percentage of directors to be elected										25.00%
Class A Common Stock | Former Shareholder
Common Stock [Line Items]
Number of directors elected | director					2
Estate owns Percentage					16.00%
Class A Common Stock | Stock Buy back Program [Member]
Common Stock [Line Items]
Share repurchase program, authorized amount | $								$ 75.8		$ 75.8
Stock repurchase program, remaining authorization amount | $								$ 18.2		$ 18.2
Stock repurchased during period shares | shares								0	0	0	0
Class B Common Stock
Common Stock [Line Items]
Number of votes per share of common stock | item										10
Conversion of shares | shares												(965,000)
Dividends declared per share						$ 0.20	$ 0.16
Class B Common Stock | Former Shareholder
Common Stock [Line Items]
Number of votes per share of common stock | item					1
Common stock shares issued | shares					0