Consolidated Statements of Changes in Shareholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Employee stock purchase plan (in shares)	2,954	1,194	1,410
Dividend reinvestment plan (in shares)	16,848	19,684	27,306
Stock grants to directors for retainer fees (in shares)	10,007	11,316	11,529
Cash dividends per common share (in dollars per share)	$ 1.5	$ 1.4	$ 1.34
Common stock issued to acquire Eastern Michigan Financial Corp. (in shares)	924,999