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2. Investment Securities | 6 Months Ended
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Jun. 30, 2013
Investments, Debt and Equity Securities [Abstract] |
Investment Securities | Investment securities available for sale at June 30, 2013 and December 31, 2012 are as follows:
(Dollars in thousands) |  |  |  |  |  |  |
| June 30, 2013
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Mortgage-backed securities | $ | 120,413 |  | 937 |  | 573 |  | 120,777
U.S. Government |  |  |  |  |  |  |  |
sponsored enterprises |  | 19,251 |  | 318 |  | - |  | 19,569
State and political subdivisions |  | 147,160 |  | 2,637 |  | 3,333 |  | 146,464
Corporate bonds |  | 3,548 |  | 20 |  | 78 |  | 3,490
Trust preferred securities |  | 1,250 |  | - |  | - |  | 1,250
Equity securities |  | 748 |  | 853 |  | - |  | 1,601
Total | $ | 292,370 |  | 4,765 |  | 3,984 |  | 293,151
(Dollars in thousands) |  |  |  |  |  |  |
| December 31, 2012
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Mortgage-backed securities | $ | 146,755 |  | 1,875 |  | 606 |  | 148,024
U.S. Government |  |  |  |  |  |  |  |
sponsored enterprises |  | 18,714 |  | 203 |  | 80 |  | 18,837
State and political subdivisions |  | 118,591 |  | 7,171 |  | 104 |  | 125,658
Corporate bonds |  | 2,571 |  | 19 |  | 4 |  | 2,586
Trust preferred securities |  | 1,250 |  | - |  | - |  | 1,250
Equity securities |  | 748 |  | 720 |  | - |  | 1,468
Total | $ | 288,629 |  | 9,988 |  | 794 |  | 297,823
The current fair value and associated unrealized losses on investments in securities with unrealized losses at June 30, 2013 and December 31, 2012 are summarized in the tables below, with the length of time the individual securities have been in a continuous loss position.
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |
| June 30, 2013
| Less than 12 Months |  | 12 Months or More |  | Total
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Mortgage-backed securities | $ | 48,281 |  | 503 |  | 5,298 |  | 70 |  | 53,579 |  | 573
State and political subdivisions |  | 56,713 |  | 3,333 |  | - |  | - |  | 56,713 |  | 3,333
Corporate bonds |  | 1,497 |  | 78 |  | - |  | - |  | 1,497 |  | 78
Total | $ | 106,491 |  | 3,914 |  | 5,298 |  | 70 |  | 111,789 |  | 3,984
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |
| December 31, 2012
| Less than 12 Months |  | 12 Months or More |  | Total
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Mortgage-backed securities | $ | 48,126 |  | 468 |  | 12,913 |  | 138 |  | 61,039 |  | 606
U.S. Government |  |  |  |  |  |  |  |  |  |  |  |
sponsored enterprises |  | 3,402 |  | 80 |  | - |  | - |  | 3,402 |  | 80
State and political subdivisions |  | 9,490 |  | 104 |  | - |  | - |  | 9,490 |  | 104
Corporate bonds |  | 1,035 |  | 4 |  | - |  | - |  | 1,035 |  | 4
Total | $ | 62,053 |  | 656 |  | 12,913 |  | 138 |  | 74,966 |  | 794
At June 30, 2013, unrealized losses in the investment securities portfolio relating to debt securities totaled $4.0 million. The unrealized losses on these debt securities arose due to changing interest rates and are considered to be temporary. From the June 30, 2013 tables above, 57 out of 178 securities issued by state and political subdivisions contained unrealized losses, 27 out of 88 securities issued by U.S. Government sponsored enterprises, including mortgage-backed securities contained unrealized losses, and two out of five securities issued by corporations contained unrealized losses. These unrealized losses are considered temporary because of acceptable investment grades on each security and the repayment sources of principal and interest on U.S. Government sponsored enterprises, including mortgage-backed securities, are government backed. The amortized cost and estimated fair value of investment securities available for sale at June 30, 2013, by contractual maturity, are shown below. Expected maturities of mortgage-backed securities will differ from contractual maturities because borrowers have the right to call or prepay obligations with or without call or prepayment penalties.
(Dollars in thousands) |  |  |
| Amortized Cost |  | Estimated Fair Value
Due within one year | $ | 3,975 |  | 4,027
Due from one to five years |  | 24,701 |  | 25,097
Due from five to ten years |  | 111,255 |  | 110,215
Due after ten years |  | 31,278 |  | 31,434
Mortgage-backed securities |  | 120,413 |  | 120,777
Equity securities |  | 748 |  | 1,601
Total | $ | 292,370 |  | 293,151
Proceeds from sales of securities available for sale during the six months ended June 30, 2013 were $17.5 million and resulted in gross gains of $738,000 and gross losses of $124,000. Proceeds from sales of securities available for sale during the six months ended June 30, 2012 were $34.8 million and resulted in gross gains of $1.2 million. Securities with a fair value of approximately $78.4 million and $73.9 million at June 30, 2013 and December 31, 2012, respectively, were pledged to secure public deposits and for other purposes as required by law.

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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