LOANS AND ALLOWANCE FOR LOAN LOSSES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Loans disclosures
Total loans	$ 2,618,029		$ 2,650,197
Less: Allowance for loan losses	22,491	23,563	23,729	22,510	23,732	24,063
Total loans, net	2,595,538		2,626,468
Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	27,248		30,964
First Commercial Bank ("FCB")
Loans disclosures
Total loans	84,381		107,652
TCB and FCB acquisitions
Loans disclosures
Total loans	111,629		138,616
Residential Real Estate | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	8,859		12,270
Residential Real Estate | First Commercial Bank ("FCB")
Loans disclosures
Total loans	26,676		32,459
Residential Real Estate | TCB and FCB acquisitions
Loans disclosures
Total loans	35,535		44,729
Residential Real Estate - Owner Occupied
Loans disclosures
Total loans	1,160,420		1,148,354
Less: Allowance for loan losses	7,563	6,984	7,006	6,190	6,015	5,212
Residential Real Estate - Non Owner Occupied
Loans disclosures
Total loans	63,707		74,539
Less: Allowance for loan losses	642	924	1,049	897	1,176	1,142
Commercial real estate
Loans disclosures
Total loans	767,334		698,611
Less: Allowance for loan losses	8,763	8,781	8,843	8,271	8,946	7,724
Commercial real estate | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	12,106		8,015
Commercial real estate | First Commercial Bank ("FCB")
Loans disclosures
Total loans	50,033		61,758
Commercial real estate | TCB and FCB acquisitions
Loans disclosures
Total loans	62,139		69,773
Commercial real estate - purchased whole loans
Loans disclosures
Total loans	33,852		33,531
Less: Allowance for loan losses	34	34	34	40
Real estate construction
Loans disclosures
Total loans	50,858		80,093
Less: Allowance for loan losses	1,587	3,101	2,769	3,097	2,402	3,042
Real estate construction | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	1,020		4,235
Real estate construction | First Commercial Bank ("FCB")
Loans disclosures
Total loans	2,174		3,301
Real estate construction | TCB and FCB acquisitions
Loans disclosures
Total loans	3,194		7,536
Commercial
Loans disclosures
Total loans	114,675		130,768
Less: Allowance for loan losses	710	727	580	603	1,086	1,025
Commercial | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	334		1,284
Commercial | First Commercial Bank ("FCB")
Loans disclosures
Total loans	5,135		9,405
Commercial | TCB and FCB acquisitions
Loans disclosures
Total loans	5,469		10,689
Warehouse lines of credit
Loans disclosures
Total loans	177,690		216,576
Less: Allowance for loan losses	462	433	541	223	150	104
Home equity
Loans disclosures
Total loans	227,137		241,853
Less: Allowance for loan losses	1,932	1,909	2,348	2,691	2,720	2,984
Home equity | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	4,199		4,183
Home equity | First Commercial Bank ("FCB")
Loans disclosures
Total loans	145		385
Home equity | TCB and FCB acquisitions
Loans disclosures
Total loans	4,344		4,568
Consumer: Credit cards
Loans disclosures
Total loans	8,656		8,716
Less: Allowance for loan losses	344	326	210	192	502	503
Consumer: Credit cards | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	251		321
Consumer: Credit cards | TCB and FCB acquisitions
Loans disclosures
Total loans	251		321
Consumer: Overdraft
Loans disclosures
Total loans	984		955
Less: Allowance for loan losses	249	209	198	125	115	135
Consumer: Overdraft | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	5		1
Consumer: Overdraft | First Commercial Bank ("FCB")
Loans disclosures
Total loans	16		11
Consumer: Overdraft | TCB and FCB acquisitions
Loans disclosures
Total loans	21		12
Consumer: Other consumer
Loans disclosures
Total loans	12,716		16,201
Less: Allowance for loan losses	205	135	151	181	268	227
Consumer: Other consumer | Tennessee Commerce Bank ("TCB")
Loans disclosures
Total loans	474		655
Consumer: Other consumer | First Commercial Bank ("FCB")
Loans disclosures
Total loans	202		333
Consumer: Other consumer | TCB and FCB acquisitions
Loans disclosures
Total loans	$ 676		$ 988