Securities (Tables)

3 Months Ended

Mar. 31, 2013

Securities [Abstract]

Schedule of securities available for sale portfolio

(Dollar amounts in thousands)	Amortized		Unrealized		Unrealized			Fair
	cost		gains		losses			value
March 31, 2013:
Trust preferred securities	$	45,895	$	409	$	(8,063	)	$	38,241
Municipal securities		177,528		12,154		(423	)		189,259
Equity securities		1,142		849		—			1,991
Corporate bonds		219,737		7,832		(496	)		227,073
Mortgage-backed securities
U.S. sponsored entities		598,647		29,535		(426	)		627,756
Private label		2,276		33		—			2,309
Subtotal mortgage-backed securities		600,923		29,568		(426	)		630,065
Total securities	$	1,045,225	$	50,812	$	(9,408	)	$	1,086,629
December 31, 2012:
Trust preferred securities	$	45,894	$	367	$	(8,234	)	$	38,027
Municipal securities		177,414		13,717		(244	)		190,887
Equity securities		1,142		676		—			1,818
Corporate bonds		219,700		7,186		(1,091	)		225,795
Mortgage-backed securities
U.S. sponsored entities		617,158		33,021		(246	)		649,933
Private label		4,139		177		—			4,316
Subtotal mortgage-backed securities		621,297		33,198		(246	)		654,249
Total securities	$	1,065,447	$	55,144	$	(9,815	)	$	1,110,776

Schedule of investments gross unrealized losses and fair value

As of March 31, 2013

(Dollar amounts in thousands)

	Less than 12 Months						12 Months or more						Total
	# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses
Trust preferred securities		—	$	—	$	—		9	$	36,353	$	8,063		9	$	36,353	$	8,063
Municipal securities		10		8,130		210		2		3,032		213		12		11,162		423
Corporate bonds		2		6,078		12		5		20,516		484		7		26,594		496
Mortgage-backed securities
U.S. sponsored entities		16		65,565		426		—		—		—		16		65,565		426
Total		28	$	79,773	$	648		16	$	59,901	$	8,760		44	$	139,674	$	9,408

As of December 31, 2012

(Dollar amounts in thousands)

	Less than 12 Months						12 Months or more						Total
	# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses		# of Securities		Fair Value		Unrealized losses
Trust preferred securities		—	$	—	$	—		9	$	36,179	$	8,234		9	$	36,179	$	8,234
Municipal securities		5		4,179		58		2		3,059		186		7		7,238		244
Corporate bonds		5		15,604		110		5		20,020		981		10		35,624		1,091
Mortgage-backed securities
U.S. sponsored entities		8		28,246		246		—		—		—		8		28,246		246
Total		18	$	48,029	$	414		16	$	59,258	$	9,401		34	$	107,287	$	9,815

Scheduled maturities of securities

As of March 31, 2013

(Dollar amounts in thousands)

	Available for sale
	Weighted			Amortized		Fair
	Average Yield			cost		value
Due in one year or less		3.71	%	$	22,982	$	23,303
Due from one year to five years		3.06	%		187,547		195,987
Due from five to ten years		3.15	%		106,489		110,108
Due after ten years		3.18	%		727,065		755,240
		3.17	%	$	1,044,083	$	1,084,638

As of December 31, 2012

(Dollar amounts in thousands)

	Available for sale
	Weighted			Amortized		Fair
	Average Yield			cost		value
Due in one year or less		3.80	%	$	19,137	$	19,411
Due from one year to five years		3.05	%		187,595		195,182
Due from five to ten years		3.27	%		108,288		111,879
Due after ten years		3.30	%		749,285		782,486
		3.26	%	$	1,064,305	$	1,108,958