SECURITIES AVAILABLE FOR SALE - Amortized costs and fair values of securities available for sale (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 407,871	$ 408,093
Gross Unrealized Gains	470	2,073
Gross Unrealized Losses	8,197	5,013
Securities available for sale (“AFS”), at fair value	400,144	405,153
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	22,467	26,586
Gross Unrealized Gains	0	0
Gross Unrealized Losses	818	377
Securities available for sale (“AFS”), at fair value	21,649	26,209
State, county and municipals
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	163,702	186,128
Gross Unrealized Gains	76	180
Gross Unrealized Losses	3,252	2,264
Securities available for sale (“AFS”), at fair value	160,526	184,044
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	134,350	157,705
Gross Unrealized Gains	328	160
Gross Unrealized Losses	3,034	2,333
Securities available for sale (“AFS”), at fair value	131,644	155,532
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	87,352	36,387
Gross Unrealized Gains	66	449
Gross Unrealized Losses	1,093	39
Securities available for sale (“AFS”), at fair value	$ 86,325	36,797
Equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		1,287
Gross Unrealized Gains		1,284
Gross Unrealized Losses		0
Securities available for sale (“AFS”), at fair value		$ 2,571

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)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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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
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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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)
-URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562

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