Annual report pursuant to Section 13 and 15(d)

Stock Compensation (Schedule of Valuation Assumptions) (Details)

v3.20.4
Stock Compensation (Schedule of Valuation Assumptions) (Details) - Stock Options [Member] - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Stock option expense for the year ( in 000's) $ 412 $ 299 $ 236
Aggregate exercise date intrinsic value of options exercised during the year ( in 000's) $ 305 $ 1,567 $ 2,752
Expected life of options in years, based upon historical experience 5 years 5 years 5 years
Risk-free interest rate 0.40% 2.00% 2.80%
Expected volatility, based upon historical volatility 22.30% 22.20% 20.80%
Expected dividend yield 3.30% 2.60% 2.90%
Average estimated value of options granted during the year $ 15.27 $ 26.85 $ 18.11