Common Shareholders' Equity (Details)		1 Months Ended	12 Months Ended
	Jan. 01, 2017 shares	Nov. 30, 2009 shares	Dec. 31, 2023 vote shares
Series A Common Shares
Common shareholders' equity, other disclosures
Number of votes | vote			10
Voting rights for number of board of directors			75%
Common Shares
Share repurchases
Repurchase authorization, cumulative shares authorized (in shares)			1,927,000
Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Per Year		1,300,000
Common shareholders' equity, other disclosures
Number of votes | vote			1
Voting rights for number of board of directors			25%
Common Shares | Maximum
Share repurchases
Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Per Year	1,300,000
Common Shares | Minimum
Share repurchases
Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Per Year	0
Common Shares | 401(k)
Common shareholders' equity, other disclosures
Shares reserved (in shares)			972,000