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Investment Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | $ 218,025 | $ 217,635
Gross Unrealized Gains | 430 | 261
Gross Unrealized Losses | (2,102) | (3,384)
Fair value | 216,353 | 214,512
U.S. government and federal agency obligations |  |
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | 12,945 | 13,667
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (233) | (303)
Fair value | 12,712 | 13,364
Government sponsored enterprises |  |
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | 37,568 | 32,786
Gross Unrealized Gains | 0 | 2
Gross Unrealized Losses | (256) | (329)
Fair value | 37,312 | 32,459
Obligations of states and political subdivisions |  |
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | 48,031 | 42,666
Gross Unrealized Gains | 261 | 123
Gross Unrealized Losses | (298) | (757)
Fair value | 47,994 | 42,032
Mortgage-backed securities |  |
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | 119,481 | 128,516
Gross Unrealized Gains | 169 | 136
Gross Unrealized Losses | (1,315) | (1,995)
Fair value | 118,335 | 126,657
Mortgage-backed securities | Residential - government agencies |  |
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | 118,491 | 127,527
Gross Unrealized Gains | 157 | 124
Gross Unrealized Losses | (1,315) | (1,995)
Fair value | 117,333 | 125,656
Mortgage-backed securities | Commercial - government agencies |  |
Amortized cost and fair value of debt securities |  |
Total Amortized Cost | 990 | 989
Gross Unrealized Gains | 12 | 12
Gross Unrealized Losses | 0 | 0
Fair value | $ 1,002 | $ 1,001

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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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