INVESTMENT SECURITIES - AFS (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Available-for-Sale Debt Securities
Amortized Cost	$ 418,542	$ 524,112
Gross Unrealized Gains	3,457	3,590
Gross Unrealized Losses	(5,946)	(3,399)
Fair Value	416,053	524,303
U.S. Treasury securities and U.S. Government agencies
Available-for-Sale Debt Securities
Amortized Cost	228,333	309,042
Gross Unrealized Gains	7	1
Gross Unrealized Losses	(2,403)	(1,451)
Fair Value	225,937	307,592
Private label mortgage backed security
Available-for-Sale Debt Securities
Amortized Cost	2,559	3,065
Gross Unrealized Gains	1,367	1,384
Fair Value	3,926	4,449
Mortgage backed securities - residential
Available-for-Sale Debt Securities
Amortized Cost	93,710	105,644
Gross Unrealized Gains	1,102	1,603
Gross Unrealized Losses	(1,742)	(873)
Fair Value	93,070	106,374
Collateralized mortgage obligations
Available-for-Sale Debt Securities
Amortized Cost	80,427	87,867
Gross Unrealized Gains	257	371
Gross Unrealized Losses	(1,801)	(1,075)
Fair Value	78,883	87,163
Corporate bonds
Available-for-Sale Debt Securities
Amortized Cost	10,000	15,001
Gross Unrealized Gains	87	124
Fair Value	10,087	15,125
Trust preferred security
Available-for-Sale Debt Securities
Amortized Cost	3,513	3,493
Gross Unrealized Gains	637	107
Fair Value	$ 4,150	$ 3,600

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
-Paragraph 1
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Amount of debt securities categorized neither as held-to-maturity nor trading.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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-Name Accounting Standards Codification
-Topic 320
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-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803

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