Investment Securities (Tables)

12 Months Ended

Dec. 31, 2013

Investments Debt And Equity Securities [Abstract]

Summary of Amortized Cost and Market Values of Investment Securities with Gross Unrealized Gains and Losses

The amortized cost and market values of investment securities, with gross unrealized gains and losses, as of December 31, 2013 and December 31, 2012, were as follows (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses						Estimated Market Value
					Less Than One Year			Greater Than One Year
December 31, 2013
Available for sale:
U.S. government agency securities	$	163,964	$	81	$	(10,991	)	$	(1,731	)	$	151,323
U.S. Treasury securities		13,022		—		(873	)		—			12,149
Municipal securities		23,240		140		(213	)		—			23,167
Mortgage-backed securities		57,010		447		(1,897	)		(16	)		55,544
Corporate bonds		37,023		395		(1,677	)		(205	)		35,536
	$	294,259	$	1,063	$	(15,651	)	$	(1,952	)	$	277,719
Held to maturity:
Municipal securities	$	44,294	$	94	$	(398	)	$	—		$	43,990
Mortgage-backed securities		50,610		12		(3,646	)		—			46,976
	$	94,904	$	106	$	(4,044	)	$	—		$	90,966
December 31, 2012
Available for sale:
U.S. government agency securities	$	128,665	$	83	$	(1	)	$	—		$	128,747
U.S. Treasury securities		10,040		5		—			—			10,045
Municipal securities		61,907		884		(44	)		—			62,747
Mortgage-backed securities		152,481		1,615		(254	)		—			153,842
Corporate bonds		49,912		410		(348	)		—			49,974
	$	403,005	$	2,997	$	(647	)	$	—		$	405,355

Summary of Investment Security Issuers

At December 31, 2013, the Company’s exposure to three investment security issuers individually exceeded 10% of shareholders’ equity (in thousands):

	Amortized Cost		Estimated Market Value
FHLB	$	83,052	$	78,729
Federal National Mortgage Association (Fannie Mae)		81,693		75,421
Federal Home Loan Mortgage Corporation (Freddie Mac)		62,281		57,860
	$	227,026	$	212,010

Summary of Amortized Cost and Estimated Market Values by Contractual Maturity of Investment Securities

The amortized cost and estimated market values by contractual maturity of investment securities as of December 31, 2013 and December 31, 2012 are shown in the following table (in thousands). Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	December 31, 2013							December 31, 2012
	Weighted Average Yield			Amortized Cost		Estimated Market Value		Weighted Average Yield			Amortized Cost		Estimated Market Value
Available for sale:
Due in one year or less		1.39	%	$	12,340	$	12,368		1.04	%	$	119,657	$	119,753
Due after one year through five years		2.58			64,790		65,038		1.96			106,676		108,349
Due after five years through ten years		2.12			180,362		168,243		2.36			130,396		130,958
Due after ten years		3.17			36,767		32,070		2.60			46,276		46,295
Total securities		2.30	%	$	294,259	$	277,719		1.67	%	$	403,005	$	405,355
Held to maturity:
Due in one year or less		1.76	%	$	1,007	$	1,007		—	%	$	—	$	—
Due after one year through five years		2.60			18,101		17,539		—			—		—
Due after five years through ten years		3.70			37,591		37,137		—			—		—
Due after ten years		3.41			38,205		35,283		—			—		—
Total securities		3.35	%	$	94,904	$	90,966		—	%	$	—	$	—

Summary of Securities in Other Assets, at Cost

At December 31, 2013 and 2012, the Company included the following securities in other assets, at cost, in the accompanying consolidated balance sheets (in thousands):

	2013		2012
FHLB stock	$	1,099	$	2,938
First National Bankers Bankshares, Inc. (FNBB) stock		600		600
Other investments		4,853		3,200
Total equity securities	$	6,552	$	6,738