SECURITIES (Detail Textuals) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Other than Temporary Impairment Losses, Investments [Abstract]
Guaranteed portion of student loan backed bonds		student loan backed bonds which are guaranteed by the U.S. Department of Education for 97% to 100% of principal.
Credit support for student loan backed bonds description		the bonds have credit support of 3% to 5%
Proceeds from sales of securities available for sale	$ 230,400	$ 230,372
Securities gross losses realized	(7,921)	(7,921)
Proceeds from calls of securities	900	1,900
Fair value of securities pledged to secure public deposits and FHLB and FRB overnight borrowings	366,400	366,400	$ 513,500
Amount owned in FHLB, ACBB and FRB stock	$ 26,747	$ 26,747	$ 35,349

Represents description of credit support for student loan backed bonds.

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- Definition

Represents description of guaranteed portion of student loan backed bonds.

+ References

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Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
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- Definition

Cash received from maturities, prepayments and calls of trading securities and other securities, classified as operating.

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Amount of cash inflow from sale of 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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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

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