XML 43 R40.htm IDEA: XBRL DOCUMENT v3.20.1
Note 4 - Securities (Details Textual)
$ in Thousands
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Number of Temporarily Impaired Securities 57  
Available-for-sale and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value $ 183,328  
Continuous Unrealized Loss Position Aggregate Losses $ 4,527  
Number of Temporarily Impaired Securities Greater than Twelve Months 1  
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value $ 596 $ 39,553
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses 42 85
National Bank of Blacksburg [Member] | Federal Home Loan Bank of Atlanta [Member]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 528,296  
Restricted Stock [Member]    
Restricted Investments $ 1,279 1,220
US States and Political Subdivisions Debt Securities [Member]    
Number of Temporarily Impaired Securities 1  
Available-for-sale and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value $ 596  
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value 596 591
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses $ 42 $ 48