Summary of Significant Accounting Policies Textuals (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in Accounting Estitmate
Change In Accounting Estimate Carrying Value Property Plant And Equipment		$ 500
Change In Accounting Estitmate After Tax Impact Net Earnings	$ 342	$ 161
Accounting Estimate Change Effect Of Change On Basic And Diluted Eanrings Per Share	$ 0.10	$ 0.04