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)

v3.10.0.1
Note 6 - Employee and Director Benefits - Assumption Used to Estimate Fair Value of Stock Option Awards (Details) - Employee Stock Option [Member]
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Expected volatility 24.72% 29.00%
Expected dividends 1.06% 0.44%
Expected term (in years) (Year) 6 years 91 days 6 years 91 days
Risk-free rate 2.67% 2.08%