LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commercial, Construction		$ 383
Total	794,881		763,513
Loans Originated By Company [Member]
Commercial, Real estate	174,746	135,943
Commercial and industrial	85,893	71,773
Commercial, Construction	27,965	18,299
Consumer, Residential real estate	53,127	47,350
Consumer, Construction	485	1,259
Consumer, Home equity	12,999	10,843
Consumer, Loans to individuals	1,557	1,532
Total	356,772	286,999
Loans Originated By Company [Member] \| Pass [Member]
Commercial, Real estate	170,365	135,144
Commercial and industrial	81,993	70,334
Commercial, Construction	27,005	17,673
Consumer, Residential real estate	50,900	46,608
Consumer, Construction	409	1,182
Consumer, Home equity	12,832	10,676
Consumer, Loans to individuals	1,543	1,525
Total	345,047	283,142
Loans Originated By Company [Member] \| Special Mention [Member]
Commercial, Real estate	2,972	285
Commercial and industrial	2,783	1,223
Commercial, Construction	302	0
Consumer, Residential real estate	1,724	336
Consumer, Construction	76	77
Consumer, Home equity	52	52
Consumer, Loans to individuals	8	7
Total	7,917	1,980
Loans Originated By Company [Member] \| Substandard [Member]
Commercial, Real estate	1,409	514
Commercial and industrial	1,117	216
Commercial, Construction	658	626
Consumer, Residential real estate	503	406
Consumer, Construction	0	0
Consumer, Home equity	115	115
Consumer, Loans to individuals	6	0
Total	3,808	1,877
Loans Originated By Company [Member] \| Doubtful [Member]
Commercial, Real estate	0	0
Commercial and industrial	0	0
Commercial, Construction	0	0
Consumer, Residential real estate	0	0
Consumer, Construction	0	0
Consumer, Home equity	0	0
Consumer, Loans to individuals	0	0
Total	0	0
Loans Originated By Company [Member] \| Days Past Due 30 89 [Member]
Commercial, Real estate	432	1,454
Commercial and industrial	330	616
Commercial, Construction	1,001	0
Consumer, Residential real estate	391	653
Consumer, Construction	0	0
Consumer, Home equity	0	0
Consumer, Loans to individuals	98	90
Total	2,252	2,813
Loans Originated By Company [Member] \| Greater Than 89 Days Past Due Accruing [Member]
Commercial, Real estate	234	208
Commercial and industrial	16	30
Commercial, Construction	66	74
Consumer, Residential real estate	400	406
Consumer, Construction	0	0
Consumer, Home equity	115	115
Consumer, Loans to individuals	0	0
Total	831	833
Loans Originated By Company [Member] \| Total Past Due [Member]
Commercial, Real estate	666	1,662
Commercial and industrial	346	646
Commercial, Construction	1,067	74
Consumer, Residential real estate	791	1,059
Consumer, Construction	0	0
Consumer, Home equity	115	115
Consumer, Loans to individuals	98	90
Total	3,083	3,646
Loans Originated By Company [Member] \| Loans Not Past Due [Member]
Commercial, Real estate	174,080	134,281
Commercial and industrial	85,547	71,127
Commercial, Construction	26,898	18,225
Consumer, Residential real estate	52,336	46,291
Consumer, Construction	485	1,259
Consumer, Home equity	12,884	10,728
Consumer, Loans to individuals	1,459	1,442
Total	353,689	283,353
Loans Originated By Company [Member] \| Total Loans [Member]
Commercial, Real estate	174,746	135,943
Commercial and industrial	85,893	71,773
Commercial, Construction	27,965	18,299
Consumer, Residential real estate	53,127	47,350
Consumer, Construction	485	1,259
Consumer, Home equity	12,999	10,843
Consumer, Loans to individuals	1,557	1,532
Total	356,772	286,999
Acquired Loans [Member]
Commercial, Real estate	233,728	257,012
Commercial and industrial	22,903	26,928
Commercial, Construction	51,053	54,267
Consumer, Residential real estate	74,803	77,927
Consumer, Construction	3,757	4,944
Consumer, Home equity	49,387	52,643
Consumer, Loans to individuals	2,478	2,793
Total	438,109	476,514
Acquired Loans [Member] \| Pass [Member]
Commercial, Real estate	187,509	200,494
Commercial and industrial	20,459	24,461
Commercial, Construction	20,983	26,117
Consumer, Residential real estate	59,461	63,620
Consumer, Construction	3,082	3,941
Consumer, Home equity	45,425	48,579
Consumer, Loans to individuals	2,148	2,422
Total	339,067	369,634
Acquired Loans [Member] \| Special Mention [Member]
Commercial, Real estate	23,052	41,426
Commercial and industrial	1,507	1,201
Commercial, Construction	23,644	20,976
Consumer, Residential real estate	9,171	7,240
Consumer, Construction	252	549
Consumer, Home equity	1,371	1,989
Consumer, Loans to individuals	163	138
Total	59,160	73,519
Acquired Loans [Member] \| Substandard [Member]
Commercial, Real estate	23,167	15,092
Commercial and industrial	937	1,266
Commercial, Construction	6,219	6,791
Consumer, Residential real estate	6,135	7,029
Consumer, Construction	423	454
Consumer, Home equity	2,591	2,075
Consumer, Loans to individuals	167	233
Total	39,639	32,940
Acquired Loans [Member] \| Doubtful [Member]
Commercial, Real estate	0	0
Commercial and industrial	0	0
Commercial, Construction	207
Consumer, Residential real estate	36	38
Consumer, Construction	0	0
Consumer, Home equity	0	0
Consumer, Loans to individuals	0	0
Total	243	421
Acquired Loans [Member] \| Days Past Due 30 89 [Member]
Commercial, Real estate	1,868	744
Commercial and industrial	226	262
Commercial, Construction	303	326
Consumer, Residential real estate	1,040	942
Consumer, Construction	37	83
Consumer, Home equity	1,273	1,200
Consumer, Loans to individuals	2	114
Total	4,749	3,671
Acquired Loans [Member] \| Greater Than 89 Days Past Due Accruing [Member]
Commercial, Real estate	1,234	1,249
Commercial and industrial	20	0
Commercial, Construction	18	156
Consumer, Residential real estate	402	669
Consumer, Construction	36	70
Consumer, Home equity	834	597
Consumer, Loans to individuals	155	223
Total	2,699	2,964
Acquired Loans [Member] \| Total Past Due [Member]
Commercial, Real estate	3,102	1,993
Commercial and industrial	246	262
Commercial, Construction	321	482
Consumer, Residential real estate	1,442	1,611
Consumer, Construction	73	153
Consumer, Home equity	2,107	1,797
Consumer, Loans to individuals	157	337
Total	7,448	6,635
Acquired Loans [Member] \| Loans Not Past Due [Member]
Commercial, Real estate	114,987	129,762
Commercial and industrial	10,084	13,321
Commercial, Construction	12,495	13,375
Consumer, Residential real estate	50,240	53,285
Consumer, Construction	2,871	3,980
Consumer, Home equity	47,238	50,803
Consumer, Loans to individuals	2,115	2,246
Total	240,030	266,772
Acquired Loans [Member] \| Total Loans [Member]
Commercial, Real estate	118,089	131,755
Commercial and industrial	10,330	13,583
Commercial, Construction	12,816	13,857
Consumer, Residential real estate	51,682	54,896
Consumer, Construction	2,944	4,133
Consumer, Home equity	49,345	52,600
Consumer, Loans to individuals	2,272	2,583
Total	$ 247,478	$ 273,407

Amount before allowance of loans issued to build, improve or remodel a residential home. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References+ Details

Amount before allowance of revolving, open-end loan, extended under a line of credit and secured by the borrower's residential property. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References+ Details

- Definition

Amount before allowance of consumer real estate loans. Includes, but not limited to, construction financing, residential mortgage loans, and home equity lines of credit. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References+ Details

- Definition

Amount before allowance of loans issued to commercial and industrial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes real estate loans and loans covered under loss sharing agreements.

+ References+ Details

- Definition

Amount before allowance of commercial construction loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References+ Details

- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph a

-Article 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(a))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5066-111524

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(c))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 60

-Paragraph 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 51, 52, 53

-IssueDate 2006-05-01

-Chapter 8

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details