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Securities - Schedule of Amortized Cost of Debt Securities and Their Approximate Fair Values (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Available for sale securities: |  |
Available for sale securities, Fair Value | $ 355,981 | $ 250,603
Total Available for sale securities, Amortized Cost | 358,981 | 251,381
Total Available for sale securities, Gross Unrealized Gains | 309 | 658
Total Available for sale securities, Gross Unrealized Losses | (3,309) | (1,436)
Total Available for sale securities, Fair Value | 355,981 | 250,603
Held to maturity securities: |  |
Held to maturity securities, Amortized Cost | 8,403 | 8,557
Held to maturity securities, Fair Value | 8,094 | 7,527
U.S. Government Agency Obligations |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 96,102 | 110,531
Available for sale securities, Gross Unrealized Gains |  | 76
Available for sale securities, Gross Unrealized Losses | (1,328) | (717)
Available for sale securities, Fair Value | 94,774 | 109,890
U.S. Treasury Notes |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 1,952 | 1,940
Available for sale securities, Gross Unrealized Losses | (47) | (6)
Available for sale securities, Fair Value | 1,905 | 1,934
Mortgage-backed Securities, Residential |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 31,067 | 33,537
Available for sale securities, Gross Unrealized Gains | 155 | 306
Available for sale securities, Gross Unrealized Losses | (641) | (180)
Available for sale securities, Fair Value | 30,581 | 33,663
Asset Backed Securities |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 10,803 | 11,883
Available for sale securities, Gross Unrealized Gains | 36 | 47
Available for sale securities, Gross Unrealized Losses | (34) | (85)
Available for sale securities, Fair Value | 10,805 | 11,845
State and Municipal |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 145,017 | 74,684
Available for sale securities, Gross Unrealized Gains | 70 | 150
Available for sale securities, Gross Unrealized Losses | (1,025) | (443)
Available for sale securities, Fair Value | 144,062 | 74,391
Corporate Bonds |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 69,088 | 15,271
Available for sale securities, Gross Unrealized Gains | 43 | 52
Available for sale securities, Gross Unrealized Losses | (145) | (3)
Available for sale securities, Fair Value | 68,986 | 15,320
SBA Pooled Securities |  |
Available for sale securities: |  |
Available for sale securities, Amortized Cost | 4,952 | 3,535
Available for sale securities, Gross Unrealized Gains | 5 | 27
Available for sale securities, Gross Unrealized Losses | (89) | (2)
Available for sale securities, Fair Value | 4,868 | 3,560
CLO Securities |  |
Held to maturity securities: |  |
Held to maturity securities, Amortized Cost | 8,403 | 8,557
Held to maturity securities, Gross Unrealized Gains | 230 |
Held to maturity securities, Gross Unrealized Losses | (539) | (1,030)
Held to maturity securities, Fair Value | $ 8,094 | $ 7,527

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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