LOANS AND ALLOWANCE FOR LOAN LOSSES (Detail Textuals)
12 Months Ended
Dec. 31, 2016
USD ($)
Loan
Dec. 31, 2015
USD ($)
Loan
Dec. 31, 2014
USD ($)
Apr. 29, 2016
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Interest income lost on nonaccrual loans $ 2,000,000 $ 400,000 $ 700,000  
Interest income earned on nonaccrual loans $ 1,800,000 $ 400,000 $ 700,000  
PCI loans acquired fair value       $ 37,500,000
Nonaccretable mark       26,100,000
Accretable mark       0
Number of loans classified as troubled debt restructuring, | Loan 5 9    
Premodification balance $ 1,300,000      
Postmodification balance 800,000      
Baylake Corp        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans receivables acquired at fair value in acquisition 37,500,000      
Impaired loans non accrual credit 18,800,000      
PCI loans acquired fair value       20,800,000
Nonaccretable mark       $ 13,900,000
Acquired        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans receivables acquired at fair value in acquisition 400,000      
Impaired loans non accrual credit 19,200,000      
Nonaccretable mark 14,300,000      
Accretable mark $ 0