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RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Other service charges and fees $ 3,377 $ 3,053 $ 6,411 $ 5,801  
Equity securities, at fair value 844   844   $ 825
Accumulated other comprehensive income (loss) (21,248)   (21,248)   $ (1,039)
Accounting Standards Update 2014-09 [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Other service charges and fees 200     $ 300  
Accounting Standards Update 2016-01 [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Accumulated other comprehensive income (loss) 100   100    
Accounting Standards Update 2018-02 [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax 1,400   1,400    
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax $ 500   $ 500