SECURITIES - Aggreggate fair value and gross unrealized loss of securities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Less Than 12 Months, Fair value
Available-for-sale
Municipal bonds		$ 517
Mortgage-backed securities	$ 30,690	34,758
Collateralized mortgage obligations, Non-agency	44	60
SBA bonds	348	475
CRA mutual funds	822	818
Corporate bonds		498
Total temporarily impaired securities	31,904	37,126
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency		174
Total temporarily impaired and other-than-temporarily impaired securities		37,300
Less Than 12 Months, Unrealized losses
Available-for-sale
Municipal bonds		1
Mortgage-backed securities	223	329
Collateralized mortgage obligations, Non-agency	5
SBA bonds	1	1
CRA mutual funds	16	16
Corporate bonds		3
Total temporarily impaired securities	245	350
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency		1
Total temporarily impaired and other-than-temporarily impaired securities		351
12 Months or Longer, Fair value
Available-for-sale
Municipal bonds
Mortgage-backed securities	246	249
Collateralized mortgage obligations, Non-agency	305	339
SBA bonds	74
CRA mutual funds
Corporate bonds
Total temporarily impaired securities	625	588
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily impaired and other-than-temporarily impaired securities		599
12 Months or Longer, Unrealized losses
Available-for-sale
Municipal bonds
Mortgage-backed securities	6	6
Collateralized mortgage obligations, Non-agency	4	5
SBA bonds
CRA mutual funds
Corporate bonds
Total temporarily impaired securities	10	11
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency
Total temporarily impaired and other-than-temporarily impaired securities		11
Total, Fair value
Available-for-sale
Municipal bonds		517
Mortgage-backed securities	30,936	35,007
Collateralized mortgage obligations, Non-agency	349	399
SBA bonds	422	475
CRA mutual funds	822	818
Corporate bonds		498
Total temporarily impaired securities	32,529	37,714
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency		174
Total temporarily impaired and other-than-temporarily impaired securities		37,888
Total, Unrealized losses
Available-for-sale
Municipal bonds		1
Mortgage-backed securities	229	335
Collateralized mortgage obligations, Non-agency	9	5
SBA bonds	1	1
CRA mutual funds	16	16
Corporate bonds		3
Total temporarily impaired securities	$ 255	361
Other than temporarily impaired securities, Collateralized mortgage obligations, Non-agency		1
Total temporarily impaired and other-than-temporarily impaired securities		$ 362

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- Definition

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 50
-Paragraph 2
-Subparagraph (aaa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

Reference 2: 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=36458714&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=36458714&loc=SL7669686-108580

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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- Definition

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.

+ References

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- References

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- Definition

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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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Mortgage-Backed Securities
-URI http://asc.fasb.org/extlink&oid=6517959

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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