ACQUISITION ACTIVITY (Details) (USD $)	0 Months Ended	12 Months Ended										0 Months Ended				12 Months Ended
	Dec. 28, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Commercial, financial and agricultural [Member]	Dec. 31, 2012 Real estate - construction [Member]	Dec. 31, 2012 Real estate - commercial [Member]	Dec. 31, 2012 Real Estate - Residential [Member]	Dec. 31, 2012 Installment loans to individuals [Member]	Dec. 31, 2012 Other [Member]	Dec. 31, 2012 PSB Financial Corp [Member]	Dec. 28, 2012 PSB Financial Corp [Member]	Dec. 28, 2012 PSB Financial Corp [Member] Common Stock [Member]	Dec. 28, 2012 PSB Financial Corp [Member] Preferred Stock [Member]	Dec. 02, 2011 Jefferson Bank [Member]	Dec. 02, 2011 Beacon Federal [Member]	Dec. 31, 2011 First Louisiana National Bank [Member]	Dec. 02, 2011 First Louisiana National Bank [Member]	Dec. 01, 2011 First Louisiana National Bank [Member]	Dec. 02, 2011 Combined Three Acquisition Transactions [Member]
Equity consideration [Abstract]
Stock issued (in shares)												756,511	99,971			725,000
Stock issued												$ 11,530,000	$ 9,997,000					$ 8,838,000
Non-equity consideration [Abstract]
Cash											16,003,000							11,500,000
Contingent value right											2,000,000
Total consideration paid											39,530,000							20,338,000
Fair value of net assets acquired including identifiable intangible assets										465,045,000	(21,572,000)			158,330,000	75,948,000		120,388,000	(16,230,000)	370,400,000
Goodwill											17,958,000			7,726,000	3,854,000			4,108,000	15,700,000
Refinement period of preliminary fair value after closing date of acquisition		1 year
Assets As Recorded By Acquired Company [Abstract]
Cash										17,847,000				93,800,000	52,170,000		31,208,000
Federal funds sold										5,200,000
Time deposits held in banks										172,000							710,000
Investment securities										152,667,000				175,000			32,625,000
Other investment																	140,000
Loans receivable										269,053,000				59,818,000	23,760,000		48,645,000
Fixed assets										11,845,000				2,240,000	288,000		2,234,000
Core deposit intangible										0				0	0		0
Cash surrender value of life insurance										8,234,000
Other real estate owned										838,000					51,000
Other assets										4,635,000				327,000			641,000
Total assets acquired										470,490,000				156,360,000	76,269,000		116,203,000
Liabilities As Recorded By Acquired Company [Abstract]
Deposits										399,845,000				164,368,000	76,466,000		103,857,000
FHLB advances										25,296,000
Notes payable										2,000,000
Junior subordinated debentures										13,919,000
Other liabilities										2,606,000				283,000	5,000		167,000
Total liabilities assumed										443,666,000				164,651,000	76,471,000		104,024,000
Excess of liabilities assumed over assets acquired														8,291,000	202,000
Assets Fair Value Adjustments [Abstract]
Cash										0				0	0		0
Federal funds sold										0
Time deposits held in banks										0							0
Investment securities										0				0			(1,000)
Other investments																	0
Loans receivable										(9,000,000)				(2,124,000)	(1,600,000)		(693,000)
Fixed Assets										578,000				1,392,000	153,000		1,445,000
Core deposit intangible										2,662,000				2,702,000	1,126,000		3,434,000
Cash surrender value of life insurance										0
Other real estate owned										0
Other assets										314,000				0	0		0
Total assets acquired										(5,446,000)				1,970,000	(321,000)		4,185,000
Liabilities Fair Value Adjustment [Abstract]
Deposits										722,000				1,405,000	3,331,000		134,000
FHLB advances										1,832,000
Notes payable										0
Junior subordinated debentures										0
Other liabilities										(2,747,000)				0	0		0
Total liabilities assumed										(193,000)				1,405,000	3,331,000		134,000
Aggregate fair value adjustments														565,000	(3,652,000)
Assets Fair Value [Abstract]
Cash										17,847,000				93,800,000	52,170,000		31,208,000		177,200,000
Federal funds sold										5,200,000
Time deposits held in banks										172,000							710,000
Investment securities										152,667,000				175,000			32,624,000		32,800,000
Other investments																	140,000
Loans receivable										260,053,000				57,694,000	22,160,000		47,952,000		127,800,000
Fixed assets										12,423,000				3,632,000	441,000		3,679,000		7,800,000
Core deposit intangible										2,662,000				2,702,000	1,126,000		3,434,000		23,000,000
Cash surrender value of life insurance										8,234,000
Other real estate owned										838,000
Other assets										4,949,000				327,000	51,000		641,000
Assets acquired										465,045,000	(21,572,000)			158,330,000	75,948,000		120,388,000	(16,230,000)	370,400,000
Liabilities Fair Value [Abstract]
Deposits										400,567,000				165,773,000	79,797,000		103,991,000		349,600,000
FHLB advances										27,128,000
Notes payable										2,000,000
Junior subordinated debentures										13,919,000
Other liabilities										(141,000)				283,000	5,000		167,000
Total liabilities assumed										443,473,000				166,056,000	79,802,000		104,158,000		350,000,000
Fair value of net assets acquired including identifiable intangible assets										21,572,000							16,230,000
Useful life of core intangible assets		7 years
Acquisition expense		1,200,000
Business Acquisition, Pro Forma Information [Abstract]
Total revenues, net of interest expense		89,845,000	80,573,000
Net income		14,694,000	10,361,000
Earnings per share - basic (in dollars per share)		$ 1.12	$ 0.76
Earnings per share - diluted (in dollars per share)		$ 1.09	$ 0.75
Acquired impaired loans at acquisition [Abstract]
Contractually required principal and interest payments		7,449,000
Non-accretable discount		2,084,000
Cash flows expected to be collected		5,365,000
Accretable discount		623,000
Fair value of loans acquired with a deterioration of credit quality		4,742,000
Contingent value rights terms	Generally, no contingent payment will be made if the net charge-offs on the Identified Loans exceeds $3.0 million.
Maturity date		Dec. 28, 2015
Acquisition of Loan [Line Items]
Acquired Impaired Loans		4,742,000		82,000	0	4,205,000	455,000	0	0
Acquired Performing Loans		255,311,000		59,011,000	16,431,000	127,866,000	34,232,000	17,652,000	119,000
Total Acquired Loans		$ 260,053,000		$ 59,093,000	$ 16,431,000	$ 132,071,000	$ 34,687,000	$ 17,652,000	$ 119,000