SECURITIES - Securities amortized cost; fair value and tax equivalent yield by maturity (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Amortized cost, Within 1 year
Municipal bonds	$ 76
Fair value, Within 1 year
Municipal bonds	$ 76
Yield, Within 1 year
Municipal bonds, Yield	4.92%
Amortized cost, After 1 year but within 5 years
Municipal bonds	$ 873
Fair value, After 1 year but within 5 years
Municipal bonds	$ 873
Yield, After 1 year but within 5 years
Municipal bonds, Yield	5.49%
Amortized cost, After 5 years but within 10 years
Corporate bonds	$ 2,000
Fair value, After 5 years but within 10 years
Corporate bonds	$ 2,013
Yield, After 5 years but within 10 years
Corporate bonds, Yield	5.50%
Amortized cost, After 10 years but within 15 years
Municipal bonds	$ 2,915
Fair value, After 10 years but within 15 years
Municipal bonds	$ 2,952
Yield, After 10 years but within 15 years
Municipal bonds, Yield	6.46%
Amortized cost, After 15 years
Municipal bonds	$ 11,936
Fair value, After 15 years
Municipal bonds	$ 12,095
Yield, After 15 years
Municipal bonds, Yield	6.73%
Amortized cost, total
Municipal bonds	$ 15,800
Mortgage-backed securities, U.S. Government agency and U.S. Government-sponsored enterprises	53,407
Collateralized mortgage obligations, U.S. Government agency and U.S. Government-sponsored enterprises	1,470
Collateralized mortgage obligations, Non-agency	3,327
SBA bonds	2,056
CRA mutual funds	834
Preferred Stock	7
Securities available-for-sale	78,901
Fair value, total
Municipal bonds	15,996
Mortgage-backed securities, U.S. Government agency and U.S. Government-sponsored enterprises	53,301
Collateralized mortgage obligations, U.S. Government agency and U.S. Government-sponsored enterprises	1,474
Collateralized mortgage obligations, Non-agency	3,735
SBA bonds	2,064
CRA mutual funds	818
Preferred Stock	222
Securities available-for-sale	$ 79,623
Yield, total
Municipal bonds, Yield	6.60%
Mortgage-backed securities, U.S. Government agency and U.S. Government-sponsored enterprises, Yield	2.33%
Collateralized mortgage obligations, U.S. Government agency and U.S. Government-sponsored enterprises, Yield	1.13%
Collateralized mortgage obligations, Non-agency, Yield	4.10%
SBA bonds, Yield	3.19%
CRA mutual funds, Yield	4.02%
Preferred Stock, Yield	0.00%
Securities available-for-sale, Yield	3.36%

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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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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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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 investment in debt and equity 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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Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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For an unclassified balance sheet, this item represents investments in common and preferred stocks and other forms of securities that provide ownership interests in a corporation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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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Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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