Investment Securities (Tables)

12 Months Ended

Dec. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Schedule of Securities Available for Sale

The following is a summary of the amortized cost and fair value of securities available for sale at December 31, 2012 and December 31, 2011:

			Gross Unrealized
(Dollars in thousands)	Amortized Cost		Gains		Losses		Fair Value
December 31, 2012:
U.S. Government sponsored entities	$	71,645	$	993	$	23	$	72,615
Mortgage-backed investments	185,317		5,324		78		190,563
Obligations of states and political subdivisions	68,445		3,170		154		71,461
Collateralized debt obligations	3,108		—		2,162		946
Other debt securities	12,758		219		—		12,977
	$	341,273	$	9,706	$	2,417	$	348,562
December 31, 2011:
U.S. Government sponsored entities	$	58,714	$	174	$	96	$	58,792
Mortgage-backed investments	198,832		5,016		162		203,686
Obligations of states and political subdivisions	51,763		2,459		80		54,142
Collateralized debt obligations	3,137		—		2,318		819
Other debt securities	3,444		25		134		3,335
	$	315,890	$	7,674	$	2,790	$	320,774

Schedule of Securities Available for Sale in a Continuous Loss Position

Provided below is a summary of securities available for sale which were in an unrealized loss position and the length of time that individual securities have been in a continuous loss position at December 31, 2012 and December 31, 2011. Securities on which we have taken only credit-related other-than-temporary-impairment (OTTI) write-downs are categorized as being “less than 12 months” or “12 months or more” in a continuous loss position based on the point in time that the fair value declined to below the amortized cost basis and not the period of time since the OTTI write-down.

(Dollars in thousands)	Less Than 12 Months				12 Months or More				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
December 31, 2012:
U.S. Government sponsored entities	$	5,478	$	23	$	—	$	—	$	5,478	$	23
Mortgage-backed investments	13,866		77		880		1		14,746		78
Obligations of states and political subdivisions	11,015		154		—		—		11,015		154
Collateralized debt obligations	—		—		946		2,162		946		2,162
Other debt securities	—		—		—		—		—		—
	$	30,359	$	254	$	1,826	$	2,163	$	32,185	$	2,417
December 31, 2011:
U.S. Government sponsored entities	$	23,734	$	96	$	—	$	—	$	23,734	$	96
Mortgage-backed investments	32,280		162		—		—		32,280		162
Obligations of states and political subdivisions	7,613		80		—		—		7,613		80
Collateralized debt obligations	—		—		819		2,318		819		2,318
Other debt securities	2,317		134		—		—		2,317		134
	$	65,944	$	472	$	819	$	2,318	$	66,763	$	2,790

Schedule of Other than Temporary Impairment Credit Losses Recognized in Earnings

The following table provides a roll forward of the cumulative activity related to credit losses on debt securities for which a portion of an other-than-temporary impairment was recognized in other comprehensive income.

	Year Ended December 31
(Dollars in thousands)	2012		2011		2010
Beginning balance	$	1,863	$	1,232	$	829
OTTI credit losses on previously impaired securities	29		631		403
Ending balance	$	1,892	$	1,863	$	1,232

Schedule of Investments Classified by Contractual Maturity

The amortized cost and fair values of debt securities available for sale at December 31, 2012, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay certain obligations with, or without, call or prepayment penalties. Mortgage-backed securities receive monthly payments based on the cash flows of the underlying collateral. Therefore, their stated maturities do not represent the timing of principal amounts received and no maturity distributions are shown for these securities.

(Dollars in thousands)	Amortized Cost		Fair Value
One year or less	$	14,083	$	14,187
After one through five years	84,622		86,754
After five through ten years	42,283		43,750
After ten years	14,968		13,308
	155,956		157,999
Mortgage-backed investments	185,317		190,563
	$	341,273	$	348,562

Schedule of Available Sale Securities Pledged as Collateral by Type of Obligation Secured

The following is a summary of the amortized cost and fair value of securities available for sale which were pledged to secure public deposits, short-term borrowings and for other purposes required or permitted by law:

	2012				2011
	Amortized		Fair		Amortized		Fair
(Dollars in thousands)	Cost		Value		Cost		Value
Pledged to secure public and tax deposits	$	181,817	$	186,070	$	184,739	$	188,445
Pledged for Trust account deposits	4,582		4,741		3,902		4,084
Pledged for non-public repurchase agreements	6,565		6,981		8,049		8,458
Pledged for Fed funds purchased lines of credit	1,249		1,348		1,008		1,006
Pledged for interest rate swap	1,496		1,520		1,500		1,505
Pledged for letter of credit obtained	5,733		5,876		7,837		7,924
Pledged to an insurance commissioner	550		552		548		566
Total securities pledged	$	201,992	$	207,088	$	207,583	$	211,988

Schedule of Realized Gain (Loss)

The following is a summary of gains and losses on securities available for sale:

(Dollars in thousands)	2012			2011			2010
Proceeds from sales	$	54,988		$	114,711		$	89,164
Gross realized gains	694			2,838			2,346
Gross realized losses	(137		)	(69		)	(91		)
Net gains from sales	$	557		$	2,769		$	2,255
Gross recognized losses related to the credit component of other-than-temporary impairments	$	29		$	631		$	403