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6. Fair Value, Level of Hierarchy (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Estimated Fair Value | $ 265,114 | $ 268,530
Level 1 |  |
Estimated Fair Value | 469 | 1,325
Level 2 |  |
Estimated Fair Value | 263,895 | 266,455
Level 3 |  |
Estimated Fair Value | 750 | 750
Mortgage-backed securities |  |
Estimated Fair Value | 72,778 | 77,887
Mortgage-backed securities | Level 1 |  |
Estimated Fair Value | 0 | 0
Mortgage-backed securities | Level 2 |  |
Estimated Fair Value | 72,778 | 77,887
Mortgage-backed securities | Level 3 |  |
Estimated Fair Value | 0 | 0
U.S. Government sponsored enterprises |  |
Estimated Fair Value | 40,485 | 38,417
U.S. Government sponsored enterprises | Level 1 |  |
Estimated Fair Value | 0 | 0
U.S. Government sponsored enterprises | Level 2 |  |
Estimated Fair Value | 40,485 | 38,417
U.S. Government sponsored enterprises | Level 3 |  |
Estimated Fair Value | 0 | 0
State and political subdivisions |  |
Estimated Fair Value | 149,116 | 148,245
State and political subdivisions | Level 1 |  |
Estimated Fair Value | 0 | 0
State and political subdivisions | Level 2 |  |
Estimated Fair Value | 149,116 | 148,245
State and political subdivisions | Level 3 |  |
Estimated Fair Value | 0 | 0
Corporate bonds |  |
Estimated Fair Value | 1,516 | 1,906
Corporate bonds | Level 1 |  |
Estimated Fair Value | 0 | 0
Corporate bonds | Level 2 |  |
Estimated Fair Value | 1,516 | 1,906
Corporate bonds | Level 3 |  |
Estimated Fair Value | 0 | 0
Trust preferred securities |  |
Estimated Fair Value | 750 | 750
Trust preferred securities | Level 1 |  |
Estimated Fair Value | 0 | 0
Trust preferred securities | Level 2 |  |
Estimated Fair Value | 0 | 0
Trust preferred securities | Level 3 |  |
Estimated Fair Value | 750 | 750
Equity securities |  |
Estimated Fair Value | 469 | 1,325
Equity securities | Level 1 |  |
Estimated Fair Value | 469 | 1,325
Equity securities | Level 2 |  |
Estimated Fair Value | 0 | 0
Equity securities | Level 3 |  |
Estimated Fair Value | $ 0 | $ 0

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