Quarterly report pursuant to Section 13 or 15(d)

ACCOUNTING POLICIES - New Accounting Standards (Details)

v3.10.0.1
ACCOUNTING POLICIES - New Accounting Standards (Details) - USD ($)
9 Months Ended
Sep. 30, 2018
Jun. 30, 2018
May 01, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative effect of new accounting principle in period of adoption $ (107,000) $ 0    
Accumulated other comprehensive income (loss) (24,616,000)     $ (884,000)
Retained earnings 438,513,000     $ 379,468,000
Accounting Standards Update 2017-12        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Securities, available-for-sale 187,400,000      
Cumulative effect of new accounting principle in period of adoption     $ 400,000  
Accounting Standards Update 2018-02        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Accumulated other comprehensive income (loss)     (107,000)  
Retained earnings     $ 107,000  
Accounting Standards Update 2017-12 & 2018-02        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Retained earnings $ 293,000