Acquisition (Summary of Supplemental Pro Forma Financial Information) (Details) - Landmark Bancorp, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Net interest income	$ 68,970	$ 57,531
Other income	18,959	15,978
Total net interest income and other income	87,929	73,509
Net income	$ 29,080	$ 18,402
Basic earnings per common share	$ 5.15	$ 3.52
Diluted earnings per common share	$ 5.11	$ 3.50