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2. Investment Securities (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011
Investment securities available for sale |  |
Estimated Fair Value | $ 297,823 | $ 321,388
Amortized Cost |  |
Due within one year | 4,139 |
Due from one to five years | 14,285 |
Due from five to ten years | 100,595 |
Due after ten years | 22,107 |
Mortgage-backed securities | 146,755 |
Equity securities | 748 |
Total | 288,629 |
Estimated Fair Value |  |
Due within one year | 4,163 |
Due from one to five years | 14,768 |
Due from five to ten years | 106,246 |
Due after ten years | 23,154 |
Mortgage-backed securities | 148,024 |
Equity securities | 1,468 |
Total | 297,823 |
Fair value measurements |  |
Estimated Fair Value | 297,823 | 321,388
Investment Securities Available for Sale Level 3 Valuation |  |
Balance, beginning of period | 6,594 |
Transfers in and/or (out) of Level 3 | (5,344) |
Balance, end of period | 1,250 |
Mortgage-backed securities |  |
Investment securities available for sale |  |
Amortized Cost | 146,755 | 213,378
Gross Unrealized Gains | 1,875 | 1,371
Gross Unrealized Losses | 606 | 1,056
Estimated Fair Value | 148,024 | 213,693
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 48,126 | 95,122
Less than 12 Months, Unrealized Losses | 468 | 991
12 Months or More, Fair Value | 12,913 | 4,125
12 Months or More, Unrealized Losses | 138 | 65
Total, Fair Value | 61,039 | 99,247
Total, Unrealized Losses | 606 | 1,056
Fair value measurements |  |
Estimated Fair Value | 148,024 | 213,693
Level 1 valuation | 0 | 0
Level 2 valuation | 148,024 | 208,349
Level 3 valuation | 0 | 5,344
U.S. Government sponsored enterprises |  |
Investment securities available for sale |  |
Amortized Cost | 18,714 | 7,429
Gross Unrealized Gains | 203 | 265
Gross Unrealized Losses | 80 | 0
Estimated Fair Value | 18,837 | 7,694
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 3,402 |
Less than 12 Months, Unrealized Losses | 80 |
12 Months or More, Fair Value | 0 |
12 Months or More, Unrealized Losses | 0 |
Total, Fair Value | 3,402 |
Total, Unrealized Losses | 80 |
Fair value measurements |  |
Estimated Fair Value | 18,837 | 7,694
Level 1 valuation | 0 | 0
Level 2 valuation | 18,837 | 7,694
Level 3 valuation | 0 | 0
State and political subdivisions |  |
Investment securities available for sale |  |
Amortized Cost | 118,591 | 92,996
Gross Unrealized Gains | 7,171 | 4,157
Gross Unrealized Losses | 104 | 56
Estimated Fair Value | 125,658 | 97,097
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 9,490 | 4,444
Less than 12 Months, Unrealized Losses | 104 | 56
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Losses | 0 | 0
Total, Fair Value | 9,490 | 4,444
Total, Unrealized Losses | 104 | 56
Fair value measurements |  |
Estimated Fair Value | 125,658 | 97,097
Level 1 valuation | 0 | 0
Level 2 valuation | 125,658 | 97,097
Level 3 valuation | 0 | 0
Corporate bonds |  |
Investment securities available for sale |  |
Amortized Cost | 2,571 | 546
Gross Unrealized Gains | 19 | 0
Gross Unrealized Losses | 4 | 3
Estimated Fair Value | 2,586 | 543
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 1,035 | 542
Less than 12 Months, Unrealized Losses | 4 | 3
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Losses | 0 | 0
Total, Fair Value | 1,035 | 542
Total, Unrealized Losses | 4 | 3
Fair value measurements |  |
Estimated Fair Value | 2,586 | 543
Level 1 valuation | 0 | 0
Level 2 valuation | 2,586 | 543
Level 3 valuation | 0 | 0
Trust preferred securities |  |
Investment securities available for sale |  |
Amortized Cost | 1,250 | 1,250
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 1,250 | 1,250
Fair value measurements |  |
Estimated Fair Value | 1,250 | 1,250
Level 1 valuation | 0 | 0
Level 2 valuation | 0 | 0
Level 3 valuation | 1,250 | 1,250
Equity securities |  |
Investment securities available for sale |  |
Amortized Cost | 748 | 748
Gross Unrealized Gains | 720 | 363
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 1,468 | 1,111
Fair value measurements |  |
Estimated Fair Value | 1,468 | 1,111
Level 1 valuation | 1,468 | 1,111
Level 2 valuation | 0 | 0
Level 3 valuation | 0 | 0
Total |  |
Investment securities available for sale |  |
Amortized Cost | 288,629 | 316,347
Gross Unrealized Gains | 9,988 | 6,156
Gross Unrealized Losses | 794 | 1,115
Estimated Fair Value | 297,823 | 321,388
Investment securities with continuous unrealized loss position |  |
Less than 12 Months, Fair Value | 62,053 | 100,108
Less than 12 Months, Unrealized Losses | 656 | 1,050
12 Months or More, Fair Value | 12,913 | 4,125
12 Months or More, Unrealized Losses | 138 | 65
Total, Fair Value | 74,966 | 104,233
Total, Unrealized Losses | 794 | 1,115
Fair value measurements |  |
Estimated Fair Value | $ 297,823 | $ 321,388

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