2012 ACQUISITIONS OF FAILED BANKS (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended	0 Months Ended			3 Months Ended		6 Months Ended			0 Months Ended																			0 Months Ended	3 Months Ended			0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012 item	Feb. 15, 2012 Tennessee Commerce Bank ("TCB")	Jan. 30, 2012 Tennessee Commerce Bank ("TCB")	Jan. 27, 2012 Tennessee Commerce Bank ("TCB")	Jun. 30, 2012 Tennessee Commerce Bank ("TCB")	Mar. 31, 2012 Tennessee Commerce Bank ("TCB")	Sep. 30, 2012 Tennessee Commerce Bank ("TCB")	Jun. 30, 2012 Tennessee Commerce Bank ("TCB")	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") 2012 Recast Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits: Non interest-bearing	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits: Non interest-bearing As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits: Interest-bearing	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits: Interest-bearing As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits: Interest-bearing As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Total deposits	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Total deposits As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Total deposits As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans to be repurchased by the FDIC, net of discount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans to be repurchased by the FDIC, net of discount As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans to be repurchased by the FDIC, net of discount As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans 2012 Recast Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Federal Home Loan Bank stock, at cost	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Federal Home Loan Bank stock, at cost As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB")	Dec. 31, 2012 First Commercial Bank ("FCB")	Sep. 30, 2012 First Commercial Bank ("FCB")	Sep. 07, 2012 First Commercial Bank ("FCB") As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") As Previously Reported - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") 2012 & 2013 Recast Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits: Non interest-bearing	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits: Non interest-bearing As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits: Interest-bearing	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits: Interest-bearing As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits: Interest-bearing As Previously Reported - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Total deposits	Sep. 07, 2012 First Commercial Bank ("FCB") Total deposits As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") Total deposits As Previously Reported - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Federal Home Loan Bank advances	Sep. 07, 2012 First Commercial Bank ("FCB") Federal Home Loan Bank advances As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") Federal Home Loan Bank advances As Previously Reported - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Loans	Sep. 07, 2012 First Commercial Bank ("FCB") Loans As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") Loans As Previously Reported - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Loans 2012 & 2013 Recast Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Federal Home Loan Bank stock, at cost	Sep. 07, 2012 First Commercial Bank ("FCB") Federal Home Loan Bank stock, at cost As Previously Reported - Contractual Amount
2012 ACQUISITIONS OF FAILED BANKS
Number of failed institutions acquired in FDIC-assisted transactions			2
Acquisitions of Failed Banks
Notional assets acquired											$ 221,126																							$ 214,866
Payments received from FDIC		846,390		14,000	771,000
Bargain purchase gain	1,324						(96)	27,900	(285)	27,803		27,899																				712	27,100		27,112
Assets acquired:
Cash and cash equivalents						61,852					61,943	(89)	(2)																		10,524			10,524
Securities available for sale						42,646					42,646																				12,002			12,002
Financial assets																						17,003	19,800	(2,797)	57,276	79,112	(22,666)	830	2,491	2,491																		130,351	171,744	(44,214)	2,821	407	407
Other real estate owned						9,717					14,189	(3,359)	(1,113)																		10,186			19,360	(8,389)	(785)
Core deposit intangible						64						64																			559				559
Discount											(56,970)	56,970																						(79,412)	79,412
FDIC settlement receivable						784,545					784,545																				64,326			64,326
Other assets and accrued interest receivable						885					945	(60)																			734			829	(95)
Total assets acquired						976,479					948,701	28,063	(285)																		229,089			199,780	27,273	2,036
Liabilities assumed:
Financial liabilities														19,754	19,754	927,695	927,641	54	947,449	947,395	54																7,197	7,197	189,054	189,057	(3)	196,251	196,254	(3)	3,065	3,002	63
Accrued income taxes payable						9,888						9,988	(100)																		10,418				9,706	712
Other liabilities and accrued interest payable						1,416					1,306	110																			625			524	101
Total liabilities assumed						958,753					948,701	10,152	(100)																		210,359			199,780	9,867	712
Equity:
Bargain purchase gain, net of taxes						17,726						17,911	(185)																		18,730				17,406	1,324
Total liabilities assumed and equity						$ 976,479					$ 948,701	$ 28,063	$ (285)																		$ 229,089			$ 199,780	$ 27,273	$ 2,036