INVESTMENT SECURITIES - Portfolio of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 443,928	$ 310,484
Gross Unrealized Gains	1,795	1,961
Gross Unrealized Losses	7,969	5,315
Fair Value	437,754	307,130
U.S. Agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,016
Gross Unrealized Gains	56
Gross Unrealized Losses	0
Fair Value	3,072
State, county, and municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	44,639	23,042
Gross Unrealized Gains	214	209
Gross Unrealized Losses	765	442
Fair Value	44,088	22,809
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	370,706	263,467
Gross Unrealized Gains	1,092	915
Gross Unrealized Losses	5,921	4,863
Fair Value	365,877	259,519
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	25,567	23,975
Gross Unrealized Gains	433	837
Gross Unrealized Losses	1,283	10
Fair Value	$ 24,717	$ 24,802

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).

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)
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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
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-Topic 320
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Amortized cost of 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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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Amount of 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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
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