15. OTHER NONINTEREST INCOME AND EXPENSE - Other noninterest income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Income and Expenses [Abstract]
Merchant fee income	$ 413us-gaap_MerchantDiscountFees	$ 443us-gaap_MerchantDiscountFees	$ 531us-gaap_MerchantDiscountFees
Increase in cash surrender value of life insurance policies (Note 16)	284	247	266
Other	345us-gaap_NoninterestIncomeOther	383us-gaap_NoninterestIncomeOther	274us-gaap_NoninterestIncomeOther
Other noninterest income	$ 1,042us-gaap_OtherNonoperatingIncome	$ 1,073us-gaap_OtherNonoperatingIncome	$ 1,071us-gaap_OtherNonoperatingIncome

The increase (decrease) in the beginning and end of period in insurance industry assets which are classified as cash flows from operating activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Definition

Amount of earnings on fees charged to merchants for the cardholder's use of a credit card. Excludes interest income earned on credit card balances, transactions and credit card services including late, over limit, and annual fees.

+ References

No definition available.

+ Details

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- Definition

Represents the total of noninterest income derived from certain activities and assets including (for example): (1) venture capital investments; (2) bank owned life insurance; (3) foreign currency transactions; and (4) mortgage servicing rights.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.13)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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- Details

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- Definition

The aggregate amount of other income amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5

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