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Securities - Schedule of Amortized Cost of Securities and Their Approximate Fair Values (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Available for sale securities: |  |
Total Available for sale securities, Amortized Cost | $ 256,381 | $ 275,468
Total Available for sale securities, Gross Unrealized Gains | 664 | 1,247
Total Available for sale securities, Gross Unrealized Losses | (1,436) | (1,686)
Securities - available for sale | 255,609 | 275,029
Held to maturity securities: |  |
Held to maturity securities, Amortized Cost | 8,557 | 29,352
Held to maturity securities, Fair Value | 7,527 | 30,821
U.S. Treasury Notes |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 1,940 |
Available for sale securities, Gross Unrealized Losses | (6) |
Available for sale securities, Fair Value | 1,934 |
Mutual Fund |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 5,000 | 2,000
Available for sale securities, Gross Unrealized Gains | 6 | 11
Available for sale securities, Fair Value | 5,006 | 2,011
U.S. Government Agency Obligations |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 110,531 | 180,945
Available for sale securities, Gross Unrealized Gains | 76 | 640
Available for sale securities, Gross Unrealized Losses | (717) | (643)
Available for sale securities, Fair Value | 109,890 | 180,942
Mortgage-backed Securities, Residential |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 33,537 | 24,710
Available for sale securities, Gross Unrealized Gains | 306 | 453
Available for sale securities, Gross Unrealized Losses | (180) | (173)
Available for sale securities, Fair Value | 33,663 | 24,990
Asset Backed Securities |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 11,883 | 13,031
Available for sale securities, Gross Unrealized Gains | 47 | 30
Available for sale securities, Gross Unrealized Losses | (85) | (159)
Available for sale securities, Fair Value | 11,845 | 12,902
State and Municipal |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 74,684 | 27,339
Available for sale securities, Gross Unrealized Gains | 150 | 6
Available for sale securities, Gross Unrealized Losses | (443) | (708)
Available for sale securities, Fair Value | 74,391 | 26,637
Corporate Bonds |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 15,271 | 27,287
Available for sale securities, Gross Unrealized Gains | 52 | 106
Available for sale securities, Gross Unrealized Losses | (3) | (3)
Available for sale securities, Fair Value | 15,320 | 27,390
SBA Pooled Securities |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 3,535 | 156
Available for sale securities, Gross Unrealized Gains | 27 | 1
Available for sale securities, Gross Unrealized Losses | (2) |
Available for sale securities, Fair Value | 3,560 | 157
CLO Securities |  |
Held to maturity securities: |  |
Held to maturity securities, Amortized Cost | 8,557 | 29,352
Held to maturity securities, Gross Unrecognized Gains |  | 1,527
Held to maturity securities, Gross Unrecognized Losses | (1,030) | (58)
Held to maturity securities, Fair Value | $ 7,527 | $ 30,821

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + 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 (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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