Note 5 - Core Deposit and Customer List Intangible Assets (Details Textual) - USD ($) $ in Millions	Mar. 07, 2022	May 31, 2021	May 01, 2019	Dec. 31, 2013
Core Deposits [Member] | Commonwealth [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 13
Core Deposits [Member] | Kentucky Bancshares [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$ 4
Core Deposits [Member] | King Bancorp Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 2
Core Deposits [Member] | THE BANCorp [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 3
Customer Lists [Member] | Commonwealth [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 14