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Cash and Due from Banks and Interest Bearing Deposits	12 Months Ended
Cash and Due from Banks and Interest Bearing Deposits	Dec. 31, 2021
Cash and Due from Banks and Interest Bearing Deposits [Abstract]
Cash and Due from Banks and Interest Bearing Deposits	2. Cash and Due from Banks and Interest Bearing Deposits At December 31, 2021, CTBI had cash accounts which exceeded federally insured limits, and therefore were not subject to FDIC insurance, with $262.4 million in deposits with the Federal Reserve, $19.1 million in deposits with U.S. Bank, $2.2 million in deposits with Fifth Third Bank, and $2.8 million in deposits with the Federal Home Loan Bank.