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SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2013
Investments Debt And Equity Securities [Abstract] |
Summarizes Securities Held for Investment and Securities Available for Sale | The following table summarizes securities held for investment and securities available for sale:
|  | June 30, 2013 |
|  | (Dollars in thousands) |
Held for investment, at cost (fair value: $14,654) |  | $ | 14,511 |
Available for sale, at fair value |  |  | 505,913 |
Total |  | $ | 520,424 |
Summarizes Amortized Cost and Estimated Fair Values of Securities Held for Investment | The following table summarizes the amortized cost and estimated fair values of securities held for investment:
|  | June 30, 2013 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
|  | (Dollars in thousands) |
Mortgage backed securities (1) |  | $ | 691 |  |  | $ | 57 |  |  | $ | — |  |  | $ | 748 |
States and political subdivisions |  |  | 13,820 |  |  |  | 94 |  |  |  | (8 | ) |  |  | 13,906 |
Total |  | $ | 14,511 |  |  | $ | 151 |  |  | $ | (8 | ) |  | $ | 14,654 |
Summarizes Amortized Cost and Estimated Fair Values of Securities Available for Sale | The following table summarizes the amortized cost and estimated fair values of securities available for sale:
|  | June 30, 2013 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
|  | (Dollars in thousands) |
U.S. treasury and other Federal agencies |  | $ | 422,298 |  |  | $ | 2,558 |  |  | $ | (176 | ) |  | $ | 424,680 |
Mortgage backed securities (1) |  |  | 15,417 |  |  |  | 614 |  |  |  | — |  |  |  | 16,031 |
States and political subdivisions |  |  | 50,604 |  |  |  | 1,386 |  |  |  | (61 | ) |  |  | 51,929 |
Other securities (2) |  |  | 11,094 |  |  |  | 2,315 |  |  |  | (136 | ) |  |  | 13,273 |
Total |  | $ | 499,413 |  |  | $ | 6,873 |  |  | $ | (373 | ) |  | $ | 505,913 |
(1) | Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.
(2) | Primarily consists of equity securities.
Maturity of Securities | The maturities of securities held for investment and available for sale are summarized in the following table using contractual maturities.
|  | June 30, 2013 |
|  | Amortized Cost |  |  | Estimated Fair Value |
|  | (Dollars in thousands) |
Held for Investment |  |  |  |  |  |  |  |
Contractual maturity of debt securities: |  |  |  |  |  |  |  |
Within one year |  | $ | 5,705 |  |  | $ | 5,723 |
After one year but within five years |  |  | 7,547 |  |  |  | 7,605 |
After five years but within ten years |  |  | 867 |  |  |  | 886 |
After ten years |  |  | 392 |  |  |  | 440 |
Total |  | $ | 14,511 |  |  | $ | 14,654 |
Available for Sale |  |  |  |  |  |  |  |
Contractual maturity of debt securities: |  |  |  |  |  |  |  |
Within one year |  | $ | 260,548 |  |  | $ | 260,550 |
After one year but within five years |  |  | 113,656 |  |  |  | 115,492 |
After five years but within ten years |  |  | 33,120 |  |  |  | 33,862 |
After ten years |  |  | 84,388 |  |  |  | 86,182 |
Total debt securities |  |  | 491,712 |  |  |  | 496,086 |
Equity securities |  |  | 7,701 |  |  |  | 9,827 |
Total |  | $ | 499,413 |  |  | $ | 505,913 |
Company's Book Value of Pledged Securities | The following table is a summary of the Company’s book value of securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law:
|  | June 30, 2013 |
|  | (Dollars in thousands) |
Book value of pledged securities |  | $ | 464,686 |

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