Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Available for sale debt securities, amortized cost	$ 1,114,961	$ 1,154,153
Held to maturity debt securities, fair value	$ 341,357	$ 408,519
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
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)	29,431,000	29,329,000
Common Stock, Shares, Outstanding (in shares)	29,431,000	29,329,000