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Concentrations of Credit Risk	12 Months Ended
Concentrations of Credit Risk	Dec. 31, 2016
Concentrations of Credit Risk [Abstract]
Concentrations of Credit Risk	19. Concentrations of Credit Risk CTBI’s banking activities include granting commercial, residential, and consumer loans to customers primarily located in eastern, northeastern, central, and south central Kentucky, southern West Virginia, and northeastern Tennessee. CTBI is continuing to manage all components of its portfolio mix in a manner to reduce risk from changes in economic conditions. Concentrations of credit, as defined for regulatory purposes, are reviewed quarterly by management to ensure that internally established limits based on Tier 1 Capital plus the allowance for loan and lease losses are not exceeded. At December 31, 2016 and 2015, our concentrations of lessors of non-residential buildings credits were 45% and 44% of Tier 1 Capital plus the allowance for loan and lease losses, respectively. Lessors of residential buildings and dwellings were 37% and 36%, respectively. Hotel/motel industry credits were 41% and 34%, respectively. These percentages are within our internally established limits regarding concentrations of credit.