Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)

v3.3.1.900
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)
 12 Months Ended
Dec. 31, 2015
USD ($)
loan
Dec. 31, 2014
USD ($)
Federal Home Loan Bank requires Bank to maintain percentage of stock equal to outstanding borrowings 4.25% 4.50%
Percentage of Federal Reserve Bank of Richmond reserve 6.00% 6.00%
Number of loan portfolio level segments | loan 2  
Number of loan class levels for reporting purposes | loan 14  
Number of loan class levels for reporting purposes within commercial loan portfolio segment | loan 7  
Number of loan class levels for reporting purposes within consumer loan portfolio segment | loan 7  
Held to maturity debt securities [1] $ 205,374,000  
Held for trading securities $ 0  
Future payments, contractual term 6 months  
Accruals for uncertain tax positions $ 0  
Impairment charges for goodwill or intangible assets 0  
Goodwill 293,522,000 $ 293,522,000
Liabilities for post retirement benefits payable to other beneficiaries 4,000,000 3,800,000
Affordable housing projects, recognized amortization 529,000  
Affordable housing projects, tax credits 854,000  
Affordable housing projects, liability 4,900,000  
Affordable housing projects, investment amount $ 9,900,000 $ 10,400,000
Minimum [Member]    
Commercial loans on nonaccrual status, period 90 days  
Period of updating independent appraisal 12 months  
Interest rate lock commitments period 30 days  
Estimated useful life of bank premises 3 years  
Percentage of fair value of the derivative instruments for the hedge to be highly effective 80.00%  
Tax Position Benefit Recognition Threshold 50.00%  
Maximum [Member]    
Maximum period for net realizable value 180 days  
Commercial loans on nonaccrual status, period 180 days  
Period of updating independent appraisal 24 months  
Period past due to charge off consumer loans 120 days  
Interest rate lock commitments period 120 days  
Estimated useful life of bank premises 40 years  
Percentage of fair value of the derivative instruments for the hedge to be highly effective 125.00%  
Core Deposits [Member] | Minimum [Member]    
Intangible assets, amortization period 4 years  
Core Deposits [Member] | Maximum [Member]    
Intangible assets, amortization period 14 years  
[1] The carrying value includes $6.8 million of net unrealized gains present at the time of transfer from available for securities, net of any accretion.