Securities (Tables)

3 Months Ended

Mar. 31, 2013

Securities

Schedule of amortized cost and estimated fair values of securities

	As of March 31, 2013
			Gross Unrealized					Fair
(dollars in thousands)	Cost		Gains		Losses			Value
Securities available for sale
Debt securities:
U.S. government agencies	$	13,374	$	88	$	(117	)	$	13,345
Mortgage backed securities	230,108		3,528		(346		)	233,290
Corporate bonds	25,478		148		(25		)	25,601
Municipal bonds	2,436		—		(69		)	2,367
Total debt securities	271,396		3,764		(557		)	274,603
Total securities available for sale	$	271,396	$	3,764	$	(557	)	$	274,603
Securities held to maturity
Debt securities:
Mortgage backed securities	$	14,451	$	338	$	—		$	14,789
Total debt securities	14,451		338		—			14,789
Total securities held to maturity	$	14,451	$	338	$	—		$	14,789
Total investment securities	$	285,847	$	4,102	$	(557	)	$	289,392

	As of December 31, 2012
			Gross Unrealized					Fair
	Cost		Gains		Losses			Value
Securities available for sale
Debt securities:
U.S. government agencies	$	12,976	$	141	$	(5	)	$	13,112
Mortgage backed securities	208,058		3,136		(274		)	210,919
Corporate bonds	25,559		127		(12		)	25,674
Municipal bonds	2,436		—		(174		)	2,262
Total debt securities	249,029		3,404		(465		)	251,967
Total securities available for sale	$	249,029	$	3,404	$	(465	)	$	251,967
Securities held to maturity
Debt securities:
Mortgage backed securities	$	15,237	$	369	$	—		$	15,606
Total debt securities	15,237		369		—			15,606
Total securities held to maturity	$	15,237	$	369	$	—		$	15,606
Total investment securities	$	264,266	$	3,773	$	(465	)	$	267,573

Schedule of scheduled maturities of investment securities available for sale

	March 31, 2013
	Amortized		Fair
(dollars in thousands)	Cost		Value
Due in one year or less	$	21,782	$	22,386
Due after one year through five years	50,935		52,687
Due after five years through ten years	76,113		76,746
Due after ten years	122,566		122,784
Total securities available for sale	271,396		274,603
Due in one year or less	$	—	$	—
Due after one year through five years	7,309		7,395
Due after five years through ten years	—		—
Due after ten years	7,142		7,394
Total securities held to maturity	14,451		14,789
Total investment securities	$	285,847	$	289,392

	December 31, 2012
	Amortized		Fair
(dollars in thousands)	Cost		Value
Due in one year or less	$	17,100	$	17,604
Due after one year through five years	50,109		51,757
Due after five years through ten years	70,662		71,307
Due after ten years	111,158		111,299
Total securities available for sale	249,029		251,967
Due in one year or less	$	—	$	—
Due after one year through five years	7,395		7,478
Due after five years through ten years	—		—
Due after ten years	7,842		8,128
Total securities held to maturity	15,237		15,606
Total investment securities	$	264,266	$	267,573