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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
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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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).

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