Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale, Amortized Cost	$ 1,140,571	$ 1,114,961
Debt Securities, Held-to-Maturity, Fair Value	$ 189,017	$ 341,357
Common Stock, No Par Value (in dollars per share)	$ 0	$ 0
Common Stock, Shares Authorized (in shares)	40,000,000	40,000,000
Common Stock, Shares, Issued (in shares)	29,469,000	29,431,000
Common Stock, Shares, Outstanding (in shares)	29,469,000	29,431,000