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LOANS (Detail Textuals)
$ in Thousands
3 Months Ended
Mar. 31, 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  
Fair value of loans acquired $ 438,300 $ 464,200    
FNBNY        
Classifications of loans        
Fair value of loans acquired 26,000 $ 26,500   $ 89,700
Commercial real estate | Mortgage loans        
Lending Risk        
Loan amount beyond which annual financial information is sought $ 250      
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%