XML 79 R69.htm IDEA: XBRL DOCUMENT v3.21.1
Borrowings - Additional Information (Detail)
3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
Advance
Jun. 30, 2020
Dec. 31, 2020
USD ($)
Advance
Jan. 31, 2021
USD ($)
Advance
May 28, 2020
USD ($)
Mar. 31, 2020
Nov. 20, 2015
USD ($)
Debt Instrument [Line Items]              
FHLB borrowings $ 183,122,000   $ 115,000,000 [1]        
Federal home loan bank stock 8,200,000   5,800,000        
Subordinated notes, net outstanding 54,588,000   24,506,000 [1]        
Subordinated Notes [Member]              
Debt Instrument [Line Items]              
Subordinated notes, net outstanding $ 54,600,000   24,500,000        
Subordinated debt instrument face value         $ 15,000,000   $ 10,000,000
Subordinated Notes [Member] | 2029 Bay Banks Notes [Member]              
Debt Instrument [Line Items]              
Subordinated debt instrument maturity date Oct. 15, 2029            
Debt instrument interest rate stated percentage 5.625%            
Maturity Date Oct. 14, 2024            
Debt Instrument, frequency of periodic payment semi-annually            
Debt instrument carrying amount $ 25,400,000            
Debt instrument, unamortized premium $ 855,000            
Effective interest rate 4.74%            
Subordinated Notes [Member] | 2029 Bay Banks Notes [Member] | SOFR [Member]              
Debt Instrument [Line Items]              
Debt instrument basis spread on variable rate1 433.50%            
Subordinated Notes [Member] | 2025 Bay Banks Notes [Member]              
Debt Instrument [Line Items]              
Subordinated debt instrument maturity date May 28, 2025            
Debt instrument interest rate stated percentage 6.50%            
Debt instrument carrying amount $ 6,500,000            
Debt instrument, unamortized premium $ 60,000            
Effective interest rate 4.84%            
Subordinated Notes [Member] | 2030 Notes [Member]              
Debt Instrument [Line Items]              
Effective interest rate 6.13%            
Unamortized debt issuance cost         $ 14,700,000    
Subordinated Notes [Member] | 2025 Notes [Member]              
Debt Instrument [Line Items]              
Effective interest rate 5.56%         6.88%  
Unamortized debt issuance cost             $ 8,000,000
Unsecured Lines of Credit [Member]              
Debt Instrument [Line Items]              
Maximum overnight line of credit facilities available $ 79,000,000   38,000,000        
Overnight line of credit facilities outstanding $ 0   $ 0        
Federal Reserve Paycheck Protection Program Liquidity [Member]              
Debt Instrument [Line Items]              
Percentage of advances on PPP loan value and term   100.00%          
Fixed annual cost basis points   35.00%          
Number of advances | Advance 77   23        
Total advances $ 509,700,000   $ 281,600,000        
Federal Reserve Paycheck Protection Program Liquidity [Member] | Minimum [Member]              
Debt Instrument [Line Items]              
Borrowing maturity 1 year   1 year 2 months 12 days        
Federal Reserve Paycheck Protection Program Liquidity [Member] | Maximum [Member]              
Debt Instrument [Line Items]              
Borrowing maturity 4 years 10 months 24 days   4 years 6 months        
Bay Banks [Member] | Subordinated Notes [Member]              
Debt Instrument [Line Items]              
Subordinated notes, net outstanding       $ 30,900,000      
Subordinated debt instrument face value       $ 31,900,000      
Bay Banks [Member] | Federal Reserve Paycheck Protection Program Liquidity [Member]              
Debt Instrument [Line Items]              
Number of advances | Advance       6      
Total advances       $ 24,800,000      
FHLB [Member]              
Debt Instrument [Line Items]              
Federal home loan bank advances, maximum borrowing capacity percentage on assets 30.00%            
FHLB borrowings $ 183,100,000   $ 115,000,000        
FHLB [Member] | Bay Banks [Member]              
Debt Instrument [Line Items]              
Federal home loan, advances assumed       $ 10,100,000      
FHLB [Member] | Restricted Equity Investments [Member]              
Debt Instrument [Line Items]              
Federal home loan bank stock 8,200,000            
FHLB [Member] | Line of Credit [Member]              
Debt Instrument [Line Items]              
Federal home loan bank, advances, general debt obligations, amount available 426,800,000            
FHLB [Member] | Line of Credit [Member] | 1-4 Family Residential Loans [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities 229,300,000            
FHLB [Member] | Line of Credit [Member] | Multi-Family Residential Loans [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities 34,400,000            
FHLB [Member] | Line of Credit [Member] | Commercial Real Estate Loans [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities 117,300,000            
FHLB [Member] | Line of Credit [Member] | 1-4 Family Residential Loans Held for Sale [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities 23,300,000            
FHLB [Member] | Line of Credit [Member] | Securities [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities 22,600,000            
FHLB [Member] | Line of Credit [Member] | Public Deposits with Treasury Board of Virginia [Member]              
Debt Instrument [Line Items]              
Assets pledged with federal home loan bank against credit facilities $ 59,000,000            
[1] Derived from audited December 31, 2020 Consolidated Financial Statements.