Investment Securities Held To Maturity

3 Months Ended

Mar. 31, 2012

Securities Available For Sale and Investment Securities Held To Maturity [Abstract]

Investment Securities Held To Maturity

Note 5. Investment Securities Held-to-Maturity

	March 31, 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	$	24,665	$	9	$	44	$	24,620	$	26,979	$	36	$	2	$	27,013
U.S. Government Agency and Sponsored Enterprises Mortgage Backed Securities		291,568		6,115		386		297,297		152,389		5,435		15		157,809
Total	$	316,223	$	6,124	$	430	$	321,917	$	179,368	$	5,471	$	17	$	184,822

Included in U.S. Government and Agency Securities are securities pledged to secure public deposits and repurchase agreements at fair value amounting to $24,377,000 and $8,885,000 at March 31, 2012 and December 31, 2011, respectively. Also included are securities pledged for borrowing at the Federal Home Loan Bank of Boston at fair value amounting to $114,692,000 and $49,345,000 at March 31, 2012 and December 31, 2011, respectively.

At March 31, 2012 and December 31, 2011, all mortgage-backed securities are obligations of U.S. Government Agencies and Government Sponsored Enterprises. Government Sponsored Enterprises primarily refer to debt securities of Fannie Mae and Freddie Mac.

The following table shows the maturity distribution of the Company’s securities held-to-maturity at March 31, 2012.

	Amortized Cost		Fair Value
	( In thousands)
Within one year	$	6,311	$	6,440
After one but within five years		239,130		244,509
After five but within ten years		70,499		70,682
More than ten years		283		286
Total	$	316,223	$	321,917

The weighted average remaining life of investment securities held-to-maturity at March 31, 2012 was 4.3 years. Included in the weighted average remaining life calculation at March 31, 2012 were $19,655,000 of U.S. Government Sponsored Enterprises obligations that are callable at the discretion of the issuer. The actual maturities, which were used in the table above, of mortgage-backed securities, will differ from the contractual maturities, due to the ability of the issuers to prepay underlying obligations.

As of March 31, 2012 and December 31, 2011, management concluded that the unrealized losses of its investment securities are temporary in nature since they are not related to the underlying credit quality of the issuers, and the Company does not intend to sell these debt securities and it is not likely that it will be required to sell these debt securities before the anticipated recovery of their remaining amortized costs. In making its other-than-temporary impairment evaluation, the Company considered the fact that the principal and interest on these securities are from issuers that are investment grade.

The unrealized loss on U.S. Government Agency and Sponsored Enterprises Mortgage-Backed Securities related primarily to interest rates and not credit quality, and because the Company does not intend to sell any of these securities and it is not likely that it will be required to sell these securities before the anticipated recovery of the remaining amortized cost, the Company does not consider these investments to be other-than-temporarily impaired at March 31, 2012 and December 31, 2011.

In evaluating the underlying credit quality of a security, management considers several factors such as the credit rating of the obligor and the issuer, if applicable. Internal reviews of issuer financial statements are performed as deemed necessary.

The following table shows the temporarily impaired securities of the Company’s held-to-maturity portfolio at March 31, 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 8 and 1 securities that are temporarily impaired for less than 12 months and for 12 months or longer, respectively, out of a total of 107 holdings at March 31, 2012.

	March 31, 2012
	Less Than 12 Months				12 Months or Longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(Dollars in thousands)
Temporarily Impaired Investments
U.S. Government Sponsored Enterprises	$	12,698	$	44	$	—	$	—	$	12,698	$	44
U.S. Government Agency and Sponsored Enterprise Mortgage-Backed Securities		34,068		369		5,368		17		39,436		386
Total temporarily impaired securities	$	46,766	$	413	$	5,368	$	17	$	52,314	$	430

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
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In thousands)
Temporarily Impaired Investments
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