MERGERS AND ACQUISITIONS - Net Liabilities Assumed (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Aug. 28, 2015
Dec. 31, 2014
Dec. 31, 2013
Liabilities assumed:          
Goodwill $ 18,480 $ 18,480   $ 17,779 $ 17,779
Two Susquehanna Bank Branches          
Net assets acquired:          
Cash received in transaction     $ 47,962    
Cash on hand     330    
Loans     18,200    
Bank premises, furniture and equipment     609    
Accrued interest receivable and other assets     62    
Core deposit intangible     878    
Net assets assumed     68,041    
Liabilities assumed:          
Deposits     68,697    
Accrued interest payable and other liabilities     45    
Liabilities assumed     68,742    
Net liabilities assumed     (701)    
Goodwill     701    
Assets acquired, goodwill, and liabilities assumed, net     $ 0