Investment Securities Held-to-Maturity (Tables)

9 Months Ended

Sep. 30, 2012

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

Unrealized gain (losses) on securities

	September 30, 2012								December 31, 2011
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(In thousands)
U.S. Government Sponsored Enterprises	$	7,745	$	42	$	—	$	7,787	$	26,979	$	36	$	2	$	27,013
U.S. Government Agency and Sponsored Enterprises Mortgage Backed Securities		276,745		6,414		165		282,994		152,389		5,435		15		157,809
Total	$	284,490	$	6,456	$	165	$	290,781	$	179,368	$	5,471	$	17	$	184,822

Company's securities held-to-maturity

The following table shows the maturity distribution of the Company’s securities held-to-maturity at September 30, 2012.

	Amortized Cost		Fair Value
	( In thousands)
Within one year	$	19,167	$	19,356
After one but within five years		227,971		233,077
After five but within ten years		37,076		38,061
More than ten years		276		287
Total	$	284,490	$	290,781

Unrealized market loss of securities

The following table shows the temporarily impaired securities of the Company’s held-to-maturity portfolio at September 30, 2012. This table shows the unrealized market loss of securities that have been in a continuous unrealized loss position for 12 months or less and a continuous loss position for 12 months and longer. There are 3 and 1 securities that are temporarily impaired for less than 12 months and for 12 months or longer, respectively, out of a total of 98 holdings at September 30, 2012.

	September 30, 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
	(Dollars in thousands)
U.S. Government Sponsored Enterprises	$	—	$	—	$	—	$	—	$	—	$	—
U.S. Government Agency and Sponsored Enterprise Mortgage-Backed Securities		19,030		143		5,370		22		24,400		165
Total temporarily impaired securities	$	19,030	$	143	$	5,370	$	22	$	24,400	$	165

The following table shows the temporarily impaired securities of the Company’s held-to-maturity portfolio at December 31, 2011. This table shows the unrealized market loss of securities that have been in a continuous unrealized loss position for 12 months or less and a continuous loss position for 12 months and longer. There are 2 and 0 securities that are temporarily impaired for less than 12 months and for 12 months or longer, respectively, out of a total of 92 holdings at December 31, 2011.

	December 31, 2011
	Less Than 12 Months				12 Months or Longer				Total
Temporarily Impaired Investments	FairValue		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	( In thousands)
U.S. Government Sponsored Enterprises	$	4,994	$	2	$	—	$	—	$	4,994	$	2
U.S. Government Agency and Sponsored Enterprise Mortgage-Backed Securities		5,367		15		—		—		5,367		15
Total temporarily impaired securities	$	10,361	$	17	$	—	$	—	$	10,361	$	17