Equity Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) votes $ / shares shares	Sep. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.25		$ 0.25
Share-based Compensation Arrangement by Share-based Payment Award, Description				The 2018 Plan uses a fungible share-counting method, under which each Common Share underlying an award of stock options or stock appreciation rights ("SAR") will count against the number of total shares available under the 2018 Plan as one share; and each Common Share underlying any award other than a stock option or a SAR will count against the number of total shares available under the 2018 Plan as two shares. Shares underlying awards made under the 2003 Plan or 2013 Plan that are forfeited or remain unpurchased or undistributed upon termination or expiration of the awards will become available under the 2018 Plan for use in future awards. Any Common Shares that are added back to the 2018 Plan as the result of forfeiture, termination or expiration of an award granted under the 2018 Plan or the 2013 Plan will be added back in the same manner such shares were originally counted against the total number of shares available under the 2018 Plan or 2013 Plan, as applicable. Each Common Share that is added back to the 2018 Plan due to a forfeiture, termination or expiration of an award granted under the 2003 Plan will be added back as one Common Share.
Allocated Share-based Compensation Expense | $		$ (495)	$ (1,250)	$ (814)	$ 131
Selling, General and Administrative Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense | $				$ 1,839	5,369
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period				3 years
Performance achievement level, lower range				0.00%
Performance achievement level, upper range				150.00%
Performance achievement level, target range				100.00%
Performance Shares | Selling, General and Administrative Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense | $				$ (814)	$ 799
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period				10 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares	[1]	5,507,144		5,507,144
2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Share Awards Underlying from 2003 Plan | shares		910,624		910,624
Weighted Average | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition of unrecognized compensation costs				3 years
Class B Common Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Number of Votes | votes				10
Common Stock, Shares, Issued | shares		3,667		3,667
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Holders Percentage of Total Outstanding				99.90%

[1]  *    Shares available for grant under the 2018 Plan as of September 30, 2022 are reduced by awards and increased by forfeitures or expirations. At September 30, 2022, an aggregate of 910,624 Common Shares underlie awards which were forfeited or expired unexercised under the 2003 and 2013 Plans and thus are available for future issuance under the 2018 Plan upon transfer.