Securities (Tables)

9 Months Ended

Sep. 30, 2012

Securities [Abstract]

Securities held for investment and securities available for sale

	September 30, 2012
	(Dollars in thousands)
Held for investment, at cost (market value: $17,080)	$	16,769
Available for sale, at market value		523,706
Total	$	540,475

Amortized cost and estimated market values of securities held for investment

	September 30, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Market Value
	(Dollars in thousands)
U.S. treasury and other Federal agencies	$	844	$	65	$	—		$	909
States and political subdivisions		15,925		254		(8	)		16,171
Total	$	16,769	$	319	$	(8	)	$	17,080

Amortized cost and estimated market values of securities available for sale

	September 30, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Market Value
	(Dollars in thousands)
U.S. Federal agencies (1)	$	429,163	$	4,126	$	(158	)	$	433,131
Mortgage backed securities		21,453		939		(2	)		22,390
States and political subdivisions		54,631		3,219		(21	)		57,829
Other securities (2)		8,145		2,233		(22	)		10,356
Total	$	513,392	$	10,517	$	(203	)	$	523,706

(1) Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.

(2) Primarily consists of equity securities.

Maturity of securities

	September 30, 2012
	Amortized Cost		Estimated Market Value
	(Dollars in thousands)
Held for Investment
Contractual maturity of debt securities:
Within one year	$	4,000	$	4,069
After one year but within five years		9,355		9,484
After five years but within ten years		2,825		2,878
After ten years		589		649
Total	$	16,769	$	17,080
Available for Sale
Contractual maturity of debt securities:
Within one year	$	117,905	$	118,531
After one year but within five years		252,639		255,416
After five years but within ten years		41,284		43,218
After ten years		93,419		96,185
Total debt securities		505,247		513,350
Equity securities		8,145		10,356
Total	$	513,392	$	523,706

Company's book value of pledged securities

	September 30, 2012
	(Dollars in thousands)
Book value of pledged securities	$	453,005