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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Troubled Debt Restructurings (Detail)
Sep. 30, 2016
USD ($)
contract
Dec. 31, 2015
USD ($)
contract
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 22 21
Recorded Investment | $ $ 8,060,000 $ 1,956,000
Accruing    
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 8 8
Recorded Investment | $ $ 901,000 $ 793,000
Nonaccruing    
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 14 13
Recorded Investment | $ $ 7,159,000 $ 1,163,000
Residential mortgage | Accruing | First lien    
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 8 8
Recorded Investment | $ $ 901,000 $ 793,000
Residential mortgage | Nonaccruing | First lien    
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 12 12
Recorded Investment | $ $ 1,057,000 $ 1,153,000
Installment and other loans | Nonaccruing    
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 1 1
Recorded Investment | $ $ 7,000 $ 10,000
Commercial real estate | Nonaccruing | Non-owner occupied    
Financing Receivable, Modifications [Line Items]    
Number of Contracts | contract 1 0
Recorded Investment | $ $ 6,095,000 $ 0