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, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Net Income Attributable to the Company	$ 31,458	$ 21,892	$ 25,707
Weighted Average Shares Outstanding – Basic	1,888	1,887	1,886
Incremental shares outstanding assuming the exercise of dilutive stock options and SARs (share-settled)	8	10	10
Weighted average common shares outstanding – Diluted	1,896	1,897	1,896
Basic Earnings per Common Share	$ 16.66	$ 11.60	$ 13.63
Diluted Earnings per Common Share	$ 16.59	$ 11.54	$ 13.56