SECURITIES - Aggreggate fair value and gross unrealized loss of securities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Less Than 12 Months, Fair value
Available-for-sale
Municipal bonds		$ 517
Mortgage-backed securities	$ 15,685	34,758
Collateralized mortgage obligations, Non-agency	2,526	60
SBA bonds	2,669	475
CRA mutual funds	831	818
Corporate bonds		498
Total temporarily impaired securities	21,711	37,126
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency	120	174
Total temporarily impaired and other-than-temporarily impaired securities	21,831	37,300
Less Than 12 Months, Unrealized losses
Available-for-sale
Municipal bonds		1
Mortgage-backed securities	109	329
Collateralized mortgage obligations, Non-agency	1
SBA bonds	3	1
CRA mutual funds	11	16
Corporate bonds		3
Total temporarily impaired securities	124	350
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency	5	1
Total temporarily impaired and other-than-temporarily impaired securities	129	351
12 Months or Longer, Fair value
Available-for-sale
Municipal bonds
Mortgage-backed securities	10,615	249
Collateralized mortgage obligations, Non-agency	286	339
SBA bonds	44
CRA mutual funds
Corporate bonds
Total temporarily impaired securities	10,945	588
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily impaired and other-than-temporarily impaired securities	10,945	599
12 Months or Longer, Unrealized losses
Available-for-sale
Municipal bonds
Mortgage-backed securities	64	6
Collateralized mortgage obligations, Non-agency	3	5
SBA bonds
CRA mutual funds
Corporate bonds
Total temporarily impaired securities	67	11
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily impaired and other-than-temporarily impaired securities	67	11
Total, Fair value
Available-for-sale
Municipal bonds		517
Mortgage-backed securities	26,300	35,007
Collateralized mortgage obligations, Non-agency	2,812	399
SBA bonds	2,713	475
CRA mutual funds	831	818
Corporate bonds		498
Total temporarily impaired securities	32,656	37,714
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency	120	174
Total temporarily impaired and other-than-temporarily impaired securities	32,776	37,888
Total, Unrealized losses
Available-for-sale
Municipal bonds		1
Mortgage-backed securities	173	335
Collateralized mortgage obligations, Non-agency	4	5
SBA bonds	3	1
CRA mutual funds	11	16
Corporate bonds		3
Total temporarily impaired securities	191	361
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency	5	1
Total temporarily impaired and other-than-temporarily impaired securities	$ 196	$ 362

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Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as available-for-sale that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 9A
-URI http://asc.fasb.org/extlink&oid=82896770&loc=SL6284427-111562

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

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- Definition

Total of accumulated other comprehensive loss related to that portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized either as available-for-sale or held-to-maturity that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. The amount represented by this item is net of tax, as applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580

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-Paragraph 9A
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- Definition

Investments in notes or bonds that are collateralized by a specific group of underlying assets owned by the issuer of the notes or bonds which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount of securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process.

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Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=50488274&loc=d3e64164-112818

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

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Bonds or similar securities issued by state, city, or local governments or the agencies operated by state, city, or local governments which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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