Securities (Tables)

9 Months Ended

Sep. 30, 2012

Securities [Abstract]

Schedule of securities available for sale portfolio

(Dollars amounts in thousands)	Amortized cost		Unrealized gains		Unrealized losses			Fair value
September 30, 2012:
Trust preferred securities	$	45,893	$	353	$	(8,587	)	$	37,659
Municipal securities		178,281		14,594		(239	)		192,636
Equity securities		1,235		700		—			1,935
Corporate bonds		207,033		6,762		(1,712	)		212,083
Mortgage-backed securities
U.S. sponsored entities		645,785		39,549		—			685,334
Private label		6,807		193		(32	)		6,968
Subtotal mortgage-backed securities		652,592		39,742		(32	)		692,302
Total securities	$	1,085,034	$	62,151	$	(10,570	)	$	1,136,615
December 31, 2011:
Trust preferred securities	$	45,894	$	265	$	(8,615	)	$	37,544
Municipal securities		174,288		10,427		(230	)		184,485
Equity securities		1,754		351		(2	)		2,103
Corporate bonds		165,923		1,784		(2,928	)		164,779
Mortgage-backed securities
U.S. sponsored entities		694,674		37,636		(8	)		732,302
Private label		8,964		241		(302	)		8,903
Subtotal mortgage-backed securities		703,638		37,877		(310	)		741,205
Total securities	$	1,091,497	$	50,704	$	(12,085	)	$	1,130,116

Schedule of investments gross unrealized losses and fair value

As of September 30, 2012
	Less than 12 Months						12 Months or more						Total
(Dollars amounts in thousands)	# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses
Trust preferred securities		—	$	—	$	—		9	$	35,822	$	8,587		9	$	35,822	$	8,587
Municipal securities		2		3,005		239		—		—		—		2		3,005		239
Corporate bonds		1		3,800		2		6		23,289		1,710		7		27,089		1,712
Mortgage-backed securities
Private label		—		—		—		1		1,279		32		1		1,279		32
Total		3	$	6,805	$	241		16	$	60,390	$	10,329		19	$	67,195	$	10,570

As of December 31, 2011
	Less than 12 Months						12 Months or more						Total
(Dollars amounts in thousands)	# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses
Trust preferred securities		—	$	—	$	—		9	$	35,789	$	8,615		9	$	35,789	$	8,615
Municipal securities		2		3,094		149		3		2,627		81		5		5,721		230
Equity securities		—		—		—		1		130		2		1		130		2
Corporate bonds		27		91,046		2,928		—		—		—		27		91,046		2,928
Mortgage-backed securities
U.S. sponsored entities		1		4,596		8		—		—		—		1		4,596		8
Private label		3		3,084		302		—		—		—		3		3,084		302
Subtotal mortgage-backed securities		4		7,680		310		—		—		—		4		7,680		310
Total		33	$	101,820	$	3,387		13	$	38,546	$	8,698		46	$	140,366	$	12,085

Scheduled maturities of securities

As of September 30, 2012
	Available for sale
(Dollar amounts in thousands)	Weighted Average Yield			Amortized cost		Fair value
Due in one year or less		3.93	%	$	21,514	$	21,820
Due from one year to five years		3.18	%		174,718		181,660
Due from five to ten years		3.79	%		101,673		105,645
Due after ten years		3.44	%		785,894		825,555
		3.44	%	$	1,083,799	$	1,134,680

As of December 31, 2011
	Available for sale
(Dollar amounts in thousands)	Weighted Average Yield			Amortized cost		Fair value
Due in one year or less		4.65	%	$	43,232	$	43,644
Due from one year to five years		3.62	%		106,858		107,452
Due from five to ten years		5.03	%		102,525		106,384
Due after ten years		3.74	%		837,128		870,533
		3.89	%	$	1,089,743	$	1,128,013