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Commitments, Contingencies, and Concentrations of Credit Risk (Schedule of Maximum Credit Risk for Securities) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Fannie Mae – mortgage-backed securities
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	$ 438,068
Fair value, Available for sale and held to maturity	443,717
Ginnie Mae – mortgage-backed securities
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	172,220
Fair value, Available for sale and held to maturity	174,486
Freddie Mac – mortgage-backed securities
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	162,124
Fair value, Available for sale and held to maturity	163,366
Small Business Administration securities
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	26,400
Fair value, Available for sale and held to maturity	26,100
Federal Reserve Bank - common stock
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	17,591
Fair value, Available for sale and held to maturity	17,591
Federal Home Loan Bank of Atlanta - common stock
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	15,789
Fair value, Available for sale and held to maturity	15,789
Federal Home Loan Bank System - bonds
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	15,000
Fair value, Available for sale and held to maturity	15,004
Bank of America corporate bonds
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	7,000
Fair value, Available for sale and held to maturity	7,219
Citigroup, Inc. corporate bonds
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	6,021
Fair value, Available for sale and held to maturity	6,209
Goldman Sachs Group Inc. corporate bond
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	5,055
Fair value, Available for sale and held to maturity	5,199
JP Morgan Chase corporate bond
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	5,013
Fair value, Available for sale and held to maturity	5,153
Federal Farm Credit Bank – bond
Loss Contingencies [Line Items]
Amortized cost, Available for sale and held to maturity	5,000
Fair value, Available for sale and held to maturity	$ 5,005

X

- Definition

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