TRANSACTIONS WITH RELATED PARTIES AND THEIR AFFILIATES (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
item
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Transactions with related parties and their affiliates      
Rent expense under leases from related parties $ 3,791,000 $ 3,706,000 $ 3,646,000
Total minimum lease commitments under non-cancelable operating leases      
2017 5,809,000    
2018 5,055,000    
2019 3,888,000    
2020 3,447,000    
2021 2,884,000    
Thereafter 5,385,000    
Total 26,468,000    
Loans made to executive officers and directors of Republic and their related interests      
Beginning balance 52,070,000    
Effect of changes in composition of related parties (6,185,000)    
New loans 21,618,000    
Repayments (29,549,000)    
Ending balance 37,954,000 52,070,000  
Affiliate      
Total minimum lease commitments under non-cancelable operating leases      
2017 3,508,000    
2018 2,949,000    
2019 2,165,000    
2020 1,945,000    
2021 1,477,000    
Thereafter 1,780,000    
Total 13,824,000    
Other      
Total minimum lease commitments under non-cancelable operating leases      
2017 2,301,000    
2018 2,106,000    
2019 1,723,000    
2020 1,502,000    
2021 1,407,000    
Thereafter 3,605,000    
Total 12,644,000    
Office Space Lease Company      
Total minimum lease commitments under non-cancelable operating leases      
Fees received 15,000 15,000 16,000
Local law firm      
Total minimum lease commitments under non-cancelable operating leases      
Fees paid 183,000 183,000 160,000
Consulting Firms and Local Chamber of Commerce      
Total minimum lease commitments under non-cancelable operating leases      
Fees paid $ 122,000 101,000 66,000
Number of consulting firms | item 2    
Executive officers, directors and affiliates      
Loans made to executive officers and directors of Republic and their related interests      
Deposits from executive officers, directors, and their affiliates $ 81,000,000 82,000,000  
Bernard M. Trager | RB&T      
Loans made to executive officers and directors of Republic and their related interests      
Total aggregate annual premiums paid to date on the insurance policies held in the trust 690,000    
Cash surrender value of the policies 2,100,000 2,100,000  
Repayments of indebtedness due from beneficiaries, per terms of trust 690,000    
Net death benefit 3,500,000 3,500,000  
Accounting firm      
Total minimum lease commitments under non-cancelable operating leases      
Fees received $ 1,000 $ 2,000 $ 9,000