Annual report pursuant to Section 13 and 15(d)

SECURITIES (Narrative) (Details)

v3.6.0.2
SECURITIES (Narrative) (Details)
 3 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2016
USD ($)
security
Dec. 31, 2015
USD ($)
security
Dec. 31, 2014
USD ($)
Schedule of Investments [Line Items]          
Available for sale securities that had been in a continuous loss position for more than 12 months, amount     $ 83,152,000 $ 46,168,000  
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss     1,790,000 1,382,000  
Transfer from securities available for sale to securities held to maturity $ 201,800,000   0 201,822,000 $ 0
Held to maturity securities unrealized gains before tax $ 8,100,000   5,200,000 $ 6,800,000  
Held-to-maturity securities in a continuous loss position for longer than 12 months, fair value     $ 648,000    
Held-to-maturity securities in a continuous loss position for longer than 12 months, number of securities | security     1    
Held to maturity securities in a continuous loss position, more than 12 months, accumulated loss     $ 81,000    
Federal Home Loan Bank requires Bank to maintain percentage of stock equal to outstanding borrowings     4.25% 4.25%  
Percentage of Federal Reserve Bank of Richmond reserve     6.00% 6.00%  
Restricted equity securities consist of Federal Reserve Bank stock     $ 23,800,000 $ 23,800,000  
Federal Home Loan Bank Stock     37,000,000 28,000,000  
Credit-related OTTI     $ 0 $ 300,000  
OTTI recovery amount   $ 400,000     $ 400,000
Available-for-sale Securities          
Schedule of Investments [Line Items]          
Available for sale securities that had been in a continuous loss position | security     30 20