NOTE 5 – INVESTMENT SECURITIES

The amortized cost and fair values of investment securities, with gross unrealized gains and losses, consist of the following:


(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value

March 31, 2012

Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	306,811	$	3,075	$	(167	)	$	309,719
Obligations of state and political subdivisions		131,870		6,350		(191	)		138,029
Mortgage backed securities		1,335,071		27,647		(979	)		1,361,739
Other securities		1,461		75		—			1,536

Total securities available for sale	$	1,775,213	$	37,147	$	(1,337	)	$	1,811,023

Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	85,095	$	1,683	$	—		$	86,778
Obligations of state and political subdivisions		80,486		3,730		(73	)		84,143
Mortgage backed securities		24,503		759		—			25,262

Total securities held to maturity	$	190,084	$	6,172	$	(73	)	$	196,183

December 31, 2011

Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	336,859	$	5,633	$	(4	)	$	342,488
Obligations of state and political subdivisions		137,503		6,500		(198	)		143,805
Mortgage backed securities		1,289,775		28,317		(718	)		1,317,374
Other securities		1,460		78		—			1,538

Total securities available for sale	$	1,765,597	$	40,528	$	(920	)	$	1,805,205

Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	85,172	$	1,921	$	—		$	87,093
Obligations of state and political subdivisions		81,053		3,682		(57	)		84,678
Mortgage backed securities		26,539		800		—			27,339

Total securities held to maturity	$	192,764	$	6,403	$	(57	)	$	199,110

Securities with carrying values of $1,786,174,000 and $1,698,943,000 were pledged to secure public deposits and other borrowings at March 31, 2012 and December 31, 2011, respectively.

Management evaluates securities for other-than-temporary impairment at least quarterly, and more frequently when economic or market concerns warrant such evaluation. Consideration is given to 1) the length of time and the extent to which the fair value has been less than amortized cost, 2) the financial condition and near-term prospects of the issuer, and 3) the intent and ability of the Company to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value above amortized cost. In analyzing an issuer's financial condition, management considers whether the securities are issued by the federal government or its agencies and whether downgrades by bond rating agencies have occurred, as well as review of issuer financial statements and industry analysts' reports.

Information pertaining to securities with gross unrealized losses at March 31, 2012 and December 31, 2011, aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:


	Less Than Twelve Months					Over Twelve Months					Total
(dollars in thousands)	Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value

March 31, 2012
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(167	)	$	67,848	$	—		$	—	$	(167	)	$	67,848
Obligations of state and political subdivisions		(6	)		334		(185	)		1,087		(191	)		1,421
Mortgage backed securities		(815	)		165,848		(164	)		16,856		(979	)		182,704

Total securities available for sale	$	(988	)	$	234,030	$	(349	)	$	17,943	$	(1,337	)	$	251,973

Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	—		$	—	$	—		$	—	$	—		$	—
Obligations of state and political subdivisions		(73	)		10,452		—			—		(73	)		10,452
Mortgage backed securities		—			—		—			—		—			—

Total securities held to maturity	$	(73	)	$	10,452	$	—		$	—	$	(73	)	$	10,452

December 31, 2011
Securities available for sale:
U.S. Government-sponsored enterprise obligations	$	(4	)	$	9,996	$	—		$	—	$	(4	)	$	9,996
Obligations of state and political subdivisions		(11	)		1,104		(187	)		1,085		(198	)		2,189
Mortgage backed securities		(545	)		147,803		(173	)		21,679		(718	)		169,482

Total securities available for sale	$	(560	)	$	158,903	$	(360	)	$	22,764	$	(920	)	$	181,667

Securities held to maturity:
U.S. Government-sponsored enterprise obligations	$	—		$	—	$	—		$	—	$	—		$	—
Obligations of state and political subdivisions		(26	)		2,354		(31	)		1,297		(57	)		3,651
Mortgage backed securities		—			—		—			—		—			—

Total securities held to maturity	$	(26	)	$	2,354	$	(31	)	$	1,297	$	(57	)	$	3,651

At March 31, 2012, 44 debt securities had unrealized losses of 0.5% of the securities' amortized cost basis and 0.1% of the Company's total amortized cost basis. The unrealized losses for each of the 44 securities relate to market interest rate changes. Eight of the 44 securities have been in a continuous loss position for over twelve months at March 31, 2012. These eight securities had an aggregate amortized cost basis and unrealized loss of $18,292,000 and $349,000 respectively. Seven of the eight securities were issued by either the Federal National Mortgage Association (Fannie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), or the Government National Mortgage Association (Ginnie Mae). The Fannie Mae, Freddie Mac, and Ginnie Mae securities are rated AA+ by S&P and Aaa by Moodys. One of the securities in a continuous unrealized loss position for over twelve months was issued by a political subdivision and discussed in further detail below.

At December 31, 2011, 50 debt securities had unrealized losses of 0.5% of the securities' amortized cost basis and 0.1% of the Company's total amortized cost basis. The unrealized losses for each of the 50 securities relate to market interest rate changes. 12 of the 50 securities had been in a continuous loss position for over twelve months at December 31, 2011. These 12 securities had an aggregate amortized cost basis and unrealized loss of $24,453,000 and $391,000 respectively. The 12 securities were issued by either Federal National Mortgage Association (Fannie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac) or by state and political subdivisions (Municipals). The Fannie Mae and Freddie Mac securities were rated AA+ by S&P and Aaa by Moodys.

The Company assessed the nature of the losses in its portfolio as of March 31, 2012 and December 31, 2011 to determine if there are losses that are deemed other-than-temporary. In its analysis of these securities, management considered numerous factors to determine whether there were instances where the amortized cost basis of the debt securities would not be fully recoverable, including, but not limited to:

•

the length of time and extent to which the fair value of the securities was less than their amortized cost,

•

whether adverse conditions were present in the operations, geographic area, or industry of the issuer,

•

the payment structure of the security, including scheduled interest and principal payments, including the issuer's failures to make scheduled payments, if any, and the likelihood of failure to make scheduled payments in the future,

•

changes to the rating of the security by a rating agency, and

•

subsequent recoveries or additional declines in fair value after the balance sheet date.

Management believes it has considered these factors, as well as all relevant information available, when determining the expected future cash flows of the securities in question. Except for the bond discussed below, in each instance, management has determined the cost basis of the securities would be fully recoverable. Management also has the intent and ability to hold debt securities until their maturity or anticipated recovery if the security is classified as available for sale. In addition, management does not believe the Company will be required to sell debt securities before the anticipated recovery of the amortized cost basis of the security.

During 2011, management assessed the operating environment of a bond issuer as adverse and thus concluded that the Company had one unrated revenue municipal bond that warranted the other-than-temporary impairment charge during the year ended December 31, 2011. The specific impairment was related to the loss of the contracted revenue source required for bond repayment. The Company determined the impairment charge using observable market data for similar assets, including third party valuation of the security, as well as information from unobservable inputs, including its best estimate of the recoverability of the amortized cost of the security as outlined above. Changes to the unobservable inputs used by the Company would have resulted in a higher or lower impairment charge, but the unobservable inputs were not highly sensitive and would not result in a material difference in the impairment charge recorded for the year ended December 31, 2011. The impairment recorded in 2011 brought the total impairment to 52% of the par value of the bond and provided a fair value of the bonds that was consistent with current market pricing. Because adverse conditions were noted in the operations of the bond issuer, the Company recorded the other-than-temporary impairment. During the three months ended March 31, 2012, the Company continued to analyze the operating environment of the bond as it did in 2011 and noted the bond continues to have insurance coverage from a monoline insurer and the Company is current on its receipt of interest related to the bonds. As a result of the Company's analysis, no other declines in the market value of the Company's investment securities were deemed to be other-than-temporary at March 31, 2012 or December 31, 2011.

The amortized cost and estimated fair value by maturity of investment securities at March 31, 2012 are shown in the following table. Securities are classified according to their contractual maturities without consideration of principal amortization, potential prepayments or call options. Accordingly, actual maturities may differ from contractual maturities.


	Securities Available for Sale							Securities Held to Maturity
(dollars in thousands)	Weighted Average Yield			Amortized Cost		Fair Value		Weighted Average Yield			Amortized Cost		Fair Value
Within one year or less		1.43	%	$	40,084	$	40,352		1.21	%	$	20,258	$	20,324
One through five years		2.02			138,747		140,902		2.08			70,363		72,187
After five through ten years		2.39			555,529		569,060		3.07			22,653		23,834
Over ten years		2.44			1,040,853		1,060,709		3.12			76,810		79,838

Totals		2.37	%	$	1,775,213	$	1,811,023		2.53	%	$	190,084	$	196,183

The following is a summary of realized gains and losses from the sale of securities classified as available for sale.


	Three Months Ended March 31,
(dollars in thousands)	2012			2011

Realized gains	$	2,815		$	1
Realized losses		(15	)		—

Net realized gains	$	2,800		$	1

In addition to the gains above, the Company realized certain immaterial gains on the calls of held to maturity securities.