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INVESTMENT SECURITIES | 3 Months Ended
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Mar. 31, 2013
INVESTMENT SECURITIES |
INVESTMENT SECURITIES | 4. INVESTMENT SECURITIES A summary of available for sale and held to maturity investment securities are as follows:
|  |  |  | Gross |  | Gross |  | Estimated |
|  | Amortized |  | unrealized |  | unrealized |  | fair |
|  | cost |  | gains |  | losses |  | value |
|  | (Dollars in thousands) |
March 31, 2013 |  |  |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |  |  |
U.S. Government sponsored entities debt securities |  | $ | 207,755 |  | $ | 2,343 |  | $ | — |  | $ | 210,098 |
States and political subdivisions debt securities |  | 193,648 |  | 2,022 |  | (2,044 | ) | 193,626 |
U.S. Government sponsored entities mortgage-backed securities |  | 981,911 |  | 15,876 |  | (2,781 | ) | 995,006 |
Corporate securities |  | 125,117 |  | 2,479 |  | (61 | ) | 127,535 |
Non-agency collateralized mortgage obligations |  | 9,965 |  | 19 |  | — |  | 9,984 |
Other |  | 751 |  | 65 |  | — |  | 816 |
Total |  | $ | 1,519,147 |  | $ | 22,804 |  | $ | (4,886 | ) | $ | 1,537,065 |
Held to Maturity |  |  |  |  |  |  |  |  |
U.S. Government sponsored entities mortgage-backed securities |  | $ | 159,363 |  | $ | 452 |  | $ | (332 | ) | $ | 159,483 |
December 31, 2012 |  |  |  |  |  |  |  |  |
Available for Sale |  |  |  |  |  |  |  |  |
U.S. Government sponsored entities debt securities |  | $ | 278,198 |  | $ | 2,741 |  | $ | — |  | $ | 280,939 |
States and political subdivisions debt securities |  | 184,274 |  | 2,831 |  | (1,194 | ) | 185,911 |
U.S. Government sponsored entities mortgage-backed securities |  | 925,018 |  | 17,548 |  | (1,523 | ) | 941,043 |
Corporate securities |  | 125,649 |  | 2,360 |  | (63 | ) | 127,946 |
Other |  | 866 |  | 40 |  | — |  | 906 |
Total |  | $ | 1,514,005 |  | $ | 25,520 |  | $ | (2,780 | ) | $ | 1,536,745 |
Held to Maturity |  |  |  |  |  |  |  |  |
U.S. Government sponsored entities mortgage-backed securities |  | $ | 161,848 |  | $ | 695 |  | $ | (15 | ) | $ | 162,528 |
The amortized cost and estimated fair value of investment securities at March 31, 2013 by contractual maturity are shown below. Expected maturities will differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.
|  | March 31, 2013 |
|  | Amortized Cost |  | Estimated Fair Value |
|  | (Dollars in thousands) |
Available for Sale |  |  |  |  |
Due in one year or less |  | $ | 110,289 |  | $ | 110,667 |
Due after one year through five years |  | 176,722 |  | 181,273 |
Due after five years through ten years |  | 96,482 |  | 96,745 |
Due after ten years |  | 143,027 |  | 142,574 |
Mortage-backed securities |  | 991,876 |  | 1,004,990 |
Other |  | 751 |  | 816 |
Total |  | $ | 1,519,147 |  | $ | 1,537,065 |
Held to Maturity |  |  |  |  |
Mortage-backed securities |  | $ | 159,363 |  | $ | 159,483 |
We did not sell any available for sale securities during the first quarter of 2013 and 2012. Investment securities of $863.9 million and $905.5 million at March 31, 2013 and December 31, 2012, respectively, were pledged to secure public funds on deposit, securities sold under agreements to repurchase and other long-term and short-term borrowings. None of these securities were pledged to a secured party that has the right to sell or repledge the collateral as of the same periods. Provided below is a summary of the 168 and 118 investment securities which were in an unrealized loss position at March 31, 2013 and December 31, 2012, respectively.
|  | Less than 12 months |  | 12 months or longer |  | Total |
|  |  |  | Unrealized |  |  |  | Unrealized |  |  |  | Unrealized |
Description of Securities |  | Fair Value |  | Losses |  | Fair Value |  | Losses |  | Fair Value |  | Losses |
|  | (Dollars in thousands) |
At March 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions debt securities |  | $ | 106,117 |  | $ | (2,044 | ) | $ | — |  | $ | — |  | $ | 106,117 |  | $ | (2,044 | )
U.S. Government sponsored entities mortgage-backed securities |  | 212,650 |  | (3,113 | ) | — |  | — |  | 212,650 |  | (3,113 | )
Corporate securities |  | 23,516 |  | (61 | ) | — |  | — |  | 23,516 |  | (61 | )
Total temporarily impaired securities |  | $ | 342,283 |  | $ | (5,218 | ) | $ | — |  | $ | — |  | $ | 342,283 |  | $ | (5,218 | )
At December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions |  | $ | 73,128 |  | $ | (1,194 | ) | $ | — |  | $ | — |  | $ | 73,128 |  | $ | (1,194 | )
U.S. Government sponsored entities mortgage-backed securities |  | 206,981 |  | (1,538 | ) | — |  | — |  | 206,981 |  | (1,538 | )
Corporate securities |  | 23,205 |  | (63 | ) |  |  |  |  | 23,205 |  | (63 | )
Total temporarily impaired securities |  | $ | 303,314 |  | $ | (2,795 | ) | $ | — |  | $ | — |  | $ | 303,314 |  | $ | (2,795 | )
Other-than-temporary impairment (“OTTI”) Unrealized losses for all investment securities are reviewed to determine whether the losses are deemed “other-than-temporary.” Investment securities are evaluated for OTTI on at least a quarterly basis and more frequently when economic or market conditions warrant such an evaluation to determine whether a decline in their value below amortized cost is other-than-temporary. In conducting this assessment, we evaluate a number of factors including, but not limited to: · The length of time and the extent to which fair value has been less than the amortized cost basis; · Adverse conditions specifically related to the security, an industry, or a geographic area; · The historical and implied volatility of the fair value of the security; · The payment structure of the debt security and the likelihood of the issuer being able to make payments; · Failure of the issuer to make scheduled interest or principal payments; · Any rating changes by a rating agency; and · Recoveries or additional decline in fair value subsequent to the balance sheet date. The term “other-than-temporary” is not intended to indicate that the decline is permanent, but indicates that the prospects for a near-term recovery of value are not necessarily favorable, or that there is a general lack of evidence to support a realizable value equal to or greater than the carrying value of the investment. Once a decline in value is determined to be other-than-temporary, the value of the security is reduced and a corresponding charge to earnings is recognized for anticipated credit losses. The declines in market value were primarily attributable to changes in interest rates and disruptions in the credit and financial markets. Because we have no intent to sell securities in an unrealized loss position and it is not more likely than not that we will be required to sell such securities before recovery of its amortized cost basis, we do not consider these investments to be other-than-temporarily impaired.

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