v2.4.0.6
Document and Entity Information (USD $)
12 Months Ended
Dec. 31, 2011
Feb. 29, 2012
Jun. 30, 2011
Document Information [Line Items]   
Document Type10-K  
Amendment Flagfalse  
Document Period End DateDec. 31, 2011  
Document Fiscal Year Focus2011  
Document Fiscal Period FocusFY  
Trading SymbolBKYF  
Entity Registrant NameBANK OF KENTUCKY FINANCIAL CORP  
Entity Central Index Key0000934547  
Current Fiscal Year End Date--12-31  
Entity Well-known Seasoned IssuerNo  
Entity Current Reporting StatusYes  
Entity Voluntary FilersNo  
Entity Filer CategoryAccelerated Filer  
Entity Common Stock, Shares Outstanding 7,451,035 
Entity Public Float  $ 128,294,000