Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2021
Cash dividends on common stock (in dollars per share)	$ 0.75
County Bancorp, Inc.
Common stock issued, capitalized Issuance costs		$ 397
Mackinac Financial Corporation
Common stock issued, capitalized Issuance costs		$ 392