LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in the allowance for loan losses
Balance at beginning of period	$ 6,223	$ 4,935	$ 4,076
Charge-offs	(747)	(1,308)	(1,529)
Recoveries	37	14	128
Provision	2,493	2,582	2,260
Balance at end of period	8,006	6,223	4,935
Individually evaluated for impairment	1,013	690	1,458
Collectively evaluated for impairment	6,993	5,533	3,477
Loans acquired, purchase price	1,413		76,052
Commercial
Changes in the allowance for loan losses
Balance at beginning of period	4,363	3,609	3,107
Charge-offs	(708)	(1,110)	(1,458)
Recoveries	20	7	57
Provision	2,391	1,857	1,903
Balance at end of period	6,066	4,363	3,609
Individually evaluated for impairment	708	362	1,243
Collectively evaluated for impairment	5,358	4,001	2,366
Loans acquired, purchase price	74,300
Loans acquired, premium paid			1,800
Loans acquired, outstanding balance	46,800	51,300
Loans acquired, outstanding balance, decrease	27,500
Loans acquired, refinanced	15,100
Loans acquired, sold in participation	$ 2,900
Loans acquired, remaining portfolio, weighted average yield	5.02%
Residential
Changes in the allowance for loan losses
Balance at beginning of period	$ 962	519	514
Charge-offs	(28)	(130)	(38)
Recoveries	2		60
Provision	159	573	(17)
Balance at end of period	1,095	962	519
Individually evaluated for impairment	276	298	175
Collectively evaluated for impairment	819	664	344
Home Equity
Changes in the allowance for loan losses
Balance at beginning of period	691	554	242
Charge-offs	(5)
Recoveries	4	3	10
Provision	25	134	302
Balance at end of period	715	691	554
Individually evaluated for impairment	28	28	28
Collectively evaluated for impairment	687	663	526
Consumer
Changes in the allowance for loan losses
Balance at beginning of period	207	253	213
Charge-offs	(6)	(68)	(33)
Recoveries	11	4	1
Provision	(82)	18	72
Balance at end of period	130	207	253
Individually evaluated for impairment	1	2	12
Collectively evaluated for impairment	$ 129	$ 205	$ 241

Represents the amount of premium paid for a group of loans acquired during the period.

No definition available.

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- Definition

Represents the outstanding balance of loans acquired in December of 2013 in the northern Virginia area.

+ References

No definition available.

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- Definition

Represents the increase (decrease) in the outstanding balance of loans acquired in December 2013 in the northern Virginia area.

+ References

No definition available.

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- Definition

Represents the amount refinanced by the reporting entity relating to loans that were acquired in December 2013 in the northern Virginia area.

+ References

No definition available.

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- Definition

Represents the amount of loans sold in a participation that were originally acquired in December 2013 relating to commercial real estate in the norther Virginia area.

+ References

No definition available.

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- Definition

Represents the weighted average yield of the remaining loans in the portfolio that were originally acquired in December 2013 for commercial real estate in northern Virginia.

+ References

No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

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- Definition

The cash outflow associated with purchasing loans held for investment purposes during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: 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

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 9

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