Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Employee and Director Benefits - Assumption Used to Estimate Fair Value of Stock Option Awards (Details)

v3.8.0.1
Note 6 - Employee and Director Benefits - Assumption Used to Estimate Fair Value of Stock Option Awards (Details) - Employee Stock Option [Member]
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Expected volatility 23.43% 29.00%
Expected dividends 1.07% 0.43%
Expected term (in years) (Year) 6 years 6 years
Risk-free rate 2.67% 2.08%