Earnings Per Common Share and Share Awards Computation Of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 67,020	$ 39,420
Weighted Average Shares Outstanding – Basic	1,894	1,892
Incremental shares outstanding assuming the exercise of dilutive SARs (share-settled)	6	4
Weighted average common shares outstanding – Diluted	1,900	1,896
Basic Earnings per Common Share	$ 35.38	$ 20.84
Diluted Earnings per Common Share	$ 35.28	$ 20.80