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LOANS (Detail Textuals)
6 Months Ended
Jun. 30, 2017
USD ($)
Family
Dec. 31, 2016
USD ($)
Jun. 19, 2015
USD ($)
Feb. 14, 2014
USD ($)
CNB        
Classifications of loans        
Addition in acquired loans recorded at fair value     $ 729,400,000  
Fair value of loans acquired $ 418,800,000 $ 464,200,000    
FNBNY        
Classifications of loans        
Addition in acquired loans recorded at fair value       $ 89,700,000
Fair value of loans acquired 24,800,000 $ 26,500,000    
Commercial real estate | Mortgage loans        
Lending Risk        
Loan amount beyond which annual financial information is sought $ 250,000      
Residential real estate | Mortgage loans | Home equity | Minimum        
Lending Risk        
Loan-to-value ratio (as a percent) 80.00%      
Multi-Family | Mortgage loans        
Lending Risk        
Number of families having income producing residential investment properties | Family 5      
Multi-Family | Mortgage loans | Maximum        
Lending Risk        
Loan-to-value ratio (as a percent) 75.00%