Securities Available-for-Sale (Tables)

3 Months Ended

Mar. 31, 2013

Securities Available-for-Sale and Investment Securities Held-to-Maturity [Abstract]

Summary of Securities Available-for-Sale

	March 31, 2013								December 31, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	( In thousands)
U.S. Treasury	$	2,000	$	1	$	—	$	2,001	$	2,000	$	4	$	—	$	2,004
U.S. Government Sponsored Enterprises		174,986		346		117		175,215		130,048		360		68		130,340
Small Business Administration		7,906		108		—		8,014		8,043		113		—		8,156
U.S. Government Agency and Sponsored Enterprises Mortgage Backed Securities		1,149,692		16,957		1,613		1,165,036		1,212,953		20,816		412		1,233,357
Privately Issued Residential Mortgage Backed Securities		2,805		31		16		2,820		2,938		31		22		2,947
Obligations Issued by States and Political Subdivisions		52,046		30		723		51,353		55,855		41		722		55,174
Other Debt Securities		2,300		—		62		2,238		2,300		—		47		2,253
Equity Securities		458		125		—		583		458		112		—		570
Total	$	1,392,193	$	17,598	$	2,531	$	1,407,260	$	1,414,595	$	21,477	$	1,271	$	1,434,801

Maturity distribution of securities available-for-sale

The following table shows the maturity distribution of the Company’s securities available-for-sale at March 31, 2013.

	Amortized Cost		Fair Value
	( In thousands)
Within one year	$	64,221	$	64,403
After one but within five years		1,021,035		1,035,071
After five but within ten years		293,758		295,090
More than 10 years		11,221		10,675
Non-maturing		1,958		2,021
Total	$	1,392,193	$	1,407,260

Continuous unrealized loss position for 12 months or less and 12 months or longer

The following table shows the temporarily impaired securities of the Company’s available-for-sale portfolio at March 31, 2013.

	March 31, 2013
	Less than 12 months				12 months or longer				Total
Temporarily Impaired Investments	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In thousands)
U.S. Government Sponsored Enterprises	$	29,883	$	117	$	—	$	—	$	29,883	$	117
U.S. Government Agency and Sponsored Enterprises Mortgage Backed Securities		283,816		1,589		2,834		24		286,650		1,613
Privately Issued Residential Mortgage Backed Securities		781		1		1,017		15		1,798		16
Obligations Issued by States and Political Subdivisions		—		—		3,963		723		3,963		723
Other Debt Securities		—		—		1,439		62		1,439		62
Total temporarily impaired securities	$	314,480	$	1,707	$	9,253	$	824	$	323,733	$	2,531

The following table shows the temporarily impaired securities of the Company’s available-for-sale portfolio at December 31, 2012.

	December 31, 2012
	Less than 12 months				12 months or longer				Total
Temporarily Impaired Investments	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In thousands)
U.S. Government Sponsored Enterprises	$	34,967	$	68	$	—	$	—	$	34,967	$	68
U.S. Government Agency and Sponsored Enterprises Mortgage Backed Securities		93,006		383		10,169		29		103,175		412
Privately Issued Residential Mortgage Backed Securities		—		—		1,863		22		1,863		22
Obligations Issued by States and Political Subdivisions		—		—		3,963		722		3,963		722
Other Debt Securities		—		—		1,453		47		1,453		47
Equity Securities		—		—		—		—		—		—
Total temporarily impaired securities	$	127,973	$	451	$	17,448	$	820	$	145,421	$	1,271