Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Available-for-sale Securities, Amortized Cost Basis	$ 829,899	$ 929,395
Debt Securities, Held-to-maturity, Fair Value	$ 38,086	$ 32,541
Stockholders’ equity
Preferred Stock, No Par Value	$ 0	$ 0
Preferred Stock, Shares Authorized	50,000	50,000
Preferred Stock, Shares Issued	0	0
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	24,000,000
Common Stock, Shares, Issued	21,184,157	21,156,143
Treasury Stock, Shares	1,515,624	504,182