Securities (Tables)

9 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Amortized cost and fair value of investments classified as available-for-sale

	September 30, 2013
(Dollar amounts in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. Government agencies	$	1,625	$	6	$	—		$	1,631
Mortgage Backed Securities - Residential	203,624		8,386		(1,783		)	210,227
Mortgage Backed Securities - Commercial	4,768		1		(246		)	4,523
Collateralized Mortgage Obligations	466,978		1,918		(12,784		)	456,112
State and Municipal Obligations	186,632		7,011		(1,647		)	191,996
Collateralized Debt Obligations	11,007		3,681		(7,164		)	7,524
Equity Securities	320		342		—			662
TOTAL	$	874,954	$	21,345	$	(23,624	)	$	872,675

	December 31, 2012
(Dollar amounts in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
U.S. Government agencies	$	1,807	$	79	$	—		$	1,886
Mortgage Backed Securities-residential	231,316		13,373		(13		)	244,676
Mortgage Backed Securities-commercial	5,146		1		(16		)	5,131
Collateralized mortgage obligations	230,739		2,827		(246		)	233,320
State and municipal	187,044		12,518		(77		)	199,485
Collateralized debt obligations	12,243		1,761		(7,882		)	6,122
Equities	320		60		—			380
TOTAL	$	668,615	$	30,619	$	(8,234	)	$	691,000

Schedule of contractual maturities of debt securities

Contractual maturities of debt securities at September 30, 2013 were as follows. Securities not due at a single maturity or with no maturity date, primarily mortgage-backed and equity securities are shown separately.

	Available-for-Sale
	Amortized		Fair
(Dollar amounts in thousands)	Cost		Value
Due in one year or less	$	12,171	$	12,263
Due after one but within five years	35,071		36,659
Due after five but within ten years	83,992		86,735
Due after ten years	535,008		521,606
	666,242		657,263
Mortgage-backed securities and equities	208,712		215,412
TOTAL	$	874,954	$	872,675

Schedule of gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position

The following tables show the securities’ gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in continuous unrealized loss position, at September 30, 2013 and December 31, 2012.

	September 30, 2013
	Less Than 12 Months					More Than 12 Months							Total
			Unrealized					Unrealized					Unrealized
(Dollar amounts in thousands)	Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
Mortgage Backed Securities - Residential	$	60,541	$	(1,783	)	$	—	$	—		$	60,541	$	(1,783	)
Mortgage Backed Securities - Commercial	4,486		(246		)	—		—			4,486		(246		)
Collateralized mortgage obligations	333,189		(12,258		)	8,791		(526		)	341,980		(12,784		)
State and municipal obligations	38,538		(1,553		)	991		(94		)	39,529		(1,647		)
Collateralized Debt Obligations	—		—			3,843		(7,164		)	3,843		(7,164		)
Total temporarily impaired securities	$	436,754	$	(15,840	)	$	13,625	$	(7,784	)	$	450,379	$	(23,624	)

	December 31, 2012
	Less Than 12 Months					More Than 12 Months							Total
			Unrealized					Unrealized					Unrealized
(Dollar amounts in thousands)	Fair Value		Losses			Fair Value		Losses			Fair Value		Losses
Mortgage Backed Securities - Residential	$	7,245	$	(13	)	$	—	$	—		$	7,245	$	(13	)
Mortgage Backed Securities - Commercial	5,086		(16		)	—		—			5,086		(16		)
Collateralized mortgage obligations	46,121		(246		)	—		—			46,121		(246		)
State and municipal obligations	8,611		(77		)	—		—			8,611		(77		)
Collateralized Debt Obligations	—		—			4,032		(7,882		)	4,032		(7,882		)
Total temporarily impaired securities	$	67,063	$	(352	)	$	4,032	$	(7,882	)	$	71,095	$	(8,234	)

Rollforward of the credit losses recognized in earnings

The table below presents a rollforward of the credit losses recognized in earnings for the three and nine month periods ended September 30, 2013 and 2012:

	Three Months Ended September 30,					Nine Months Ended September 30,
(Dollar amounts in thousands)	2013			2012		2013			2012
Beginning balance	$	14,983		$	14,983	$	14,983		$	15,180
Increases to the amount related to the credit
Loss for which other-than-temporary was previously recognized	—			—		—			11
Reductions for increases in cash flows collected	(581		)	—		(581		)	—
Amounts realized for securities sold during the period	—			—		—			(208		)
Ending balance	$	14,402		$	14,983	$	14,402		$	14,983