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Commitments, Contingencies, and Concentrations of Credit Risk (Schedule of Maximum Credit Risk for Securities) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Fannie Mae - mortgage-backed securities [Member]
Amortized cost, Available for sale and held to maturity	$ 79,105
Fair value, Available for sale and held to maturity	77,446
Freddie Mac - mortgage-backed securities [Member]
Amortized cost, Available for sale and held to maturity	76,161
Fair value, Available for sale and held to maturity	74,789
Small Business Administration [Member]
Amortized cost, Available for sale and held to maturity	40,315
Fair value, Available for sale and held to maturity	39,576
Ginnie Mae - mortgage-backed securities [Member]
Amortized cost, Available for sale and held to maturity	36,006
Fair value, Available for sale and held to maturity	35,538
Federal Home Loan Bank of Atlanta - common stock [Member]
Amortized cost, Available for sale and held to maturity	12,588
Fair value, Available for sale and held to maturity	12,588
Federal Home Loan Bank System - bonds [Member]
Amortized cost, Available for sale and held to maturity	11,498
Fair value, Available for sale and held to maturity	11,498
Federal Reserve Bank - Common [Stock Member]
Amortized cost, Available for sale and held to maturity	7,238
Fair value, Available for sale and held to maturity	7,238
Bank Of America Corporate Bond [Member]
Amortized cost, Available for sale and held to maturity	7,000
Fair value, Available for sale and held to maturity	6,955
Citigroup, Inc. corporate bond [Member]
Amortized cost, Available for sale and held to maturity	6,041
Fair value, Available for sale and held to maturity	6,000
Goldman Sachs Group Inc. corporate bond [Member]
Amortized cost, Available for sale and held to maturity	5,108
Fair value, Available for sale and held to maturity	5,054
JP Morgan Chase corporate bond [Member]
Amortized cost, Available for sale and held to maturity	5,027
Fair value, Available for sale and held to maturity	4,995
Financial Institutions, Inc. corporate bond [Member]
Amortized cost, Available for sale and held to maturity	4,000
Fair value, Available for sale and held to maturity	3,983
Craven County, North Carolina municipal bond [Member]
Amortized cost, Available for sale and held to maturity	3,554
Fair value, Available for sale and held to maturity	3,686
Spartanburg, South Carolina Sanitary Sewer District municipal bond [Member]
Amortized cost, Available for sale and held to maturity	3,264
Fair value, Available for sale and held to maturity	3,423
Freddie Mac - bonds [Member]
Amortized cost, Available for sale and held to maturity	3,000
Fair value, Available for sale and held to maturity	3,000
Federal Farm Credit bonds [Member]
Amortized cost, Available for sale and held to maturity	3,000
Fair value, Available for sale and held to maturity	2,993
Eagle Bancorp corporate bond [Member]
Amortized cost, Available for sale and held to maturity	2,556
Fair value, Available for sale and held to maturity	2,625
South Carolina State municipal bond [Member]
Amortized cost, Available for sale and held to maturity	2,170
Fair value, Available for sale and held to maturity	2,320
Virginia State Housing Authority municipal bond [Member]
Amortized cost, Available for sale and held to maturity	2,034
Fair value, Available for sale and held to maturity	$ 2,113

X

- Definition

This item represents the cost of debt and equity securities, available for sale and held to maturity, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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