2012 ACQUISITIONS OF FAILED BANKS (Details 2) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended				0 Months Ended																		3 Months Ended					0 Months Ended			3 Months Ended	0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	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")	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") Second Quarter 2012 Recast Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Third Quarter 2012 Recast Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") As Recasted - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Deposits As Recasted - 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 Second Quarter 2012 Recast Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans Third Quarter 2012 Recast Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Loans As Recasted - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Discount for loans to be repurchased by the FDIC	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Discount for loans to be repurchased by the FDIC As Previously Reported - Contractual Amount	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Discount for loans to be repurchased by the FDIC As Previously Reported - Fair Value Adjustments	Jan. 27, 2012 Tennessee Commerce Bank ("TCB") Discount for loans to be repurchased by the FDIC As Recasted - Fair Value Adjustments	Dec. 31, 2012 First Commercial Bank ("FCB")	Sep. 30, 2012 First Commercial Bank ("FCB")	Mar. 31, 2013 First Commercial Bank ("FCB")	Sep. 07, 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") Fourth Quarter 2012 Recast Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") First Quarter 2013 Recast Adjustments	Mar. 31, 2013 First Commercial Bank ("FCB") First Quarter 2013 Recast Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") As Recasted - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits As Previously Reported - Contractual Amount	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits As Previously Reported - Fair Value Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Deposits As Recasted - 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") Federal Home Loan Bank advances As Recasted - 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 Fourth Quarter 2012 Recast Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Loans First Quarter 2013 Recast Adjustments	Sep. 07, 2012 First Commercial Bank ("FCB") Loans As Recasted - Fair Value Adjustments
Acquisitions of Failed Banks
Assets acquired, at contractual amount								$ 221,126,000																							$ 214,866,000
Liabilities assumed, at contractual amount								(948,701,000)																							(199,780,000)
Net liabilities assumed per the P&A Agreement								(727,575,000)	(29,071,000)	(96,000)	(189,000)	(29,356,000)																			15,086,000	(52,300,000)	712,000	1,324,000		(50,264,000)
Contractual discount								(56,970,000)	56,970,000			56,970,000																			(79,412,000)	79,412,000				79,412,000
Net receivable from the FDIC							(784,545,000)	(784,545,000)																						(64,326,000)	(64,326,000)
Fair value adjustments:
Financial assets																	57,276,000	79,112,000	(22,666,000)	919,000	(89,000)	(21,836,000)	17,003,000	19,800,000	(2,797,000)	(2,797,000)																			130,351,000	171,744,000	(44,214,000)	423,000	2,398,000	(41,393,000)
Other real estate owned							9,717,000	14,189,000	(3,359,000)	(1,000,000)	(113,000)	(4,472,000)																		10,186,000	19,360,000	(8,389,000)	289,000	(1,074,000)		(9,174,000)
Core deposit intangible							64,000		64,000			64,000																		559,000		559,000				559,000
Financial liabilities													(947,449,000)	(947,395,000)	(54,000)	(54,000)																					(196,251,000)	(196,254,000)	3,000	3,000	(3,065,000)	(3,002,000)	(63,000)	(63,000)
Other assets and accrued interest receivable							885,000	945,000	(60,000)			(60,000)																		734,000	829,000	(95,000)				(95,000)
All other									(199,000)	(15,000)	13,000	(201,000)																				(101,000)				(101,000)
Total fair value adjustments								(727,575,000)	(29,071,000)	(96,000)	(189,000)	(29,356,000)																			15,086,000	(52,300,000)	712,000	1,324,000		(50,264,000)
Discount								(56,970,000)	56,970,000			56,970,000																			(79,412,000)	79,412,000				79,412,000
Bargain purchase gain, pre-tax	1,324,000		(96,000)	27,900,000	(285,000)	27,803,000			27,899,000	(96,000)	(189,000)	27,614,000															712,000	27,100,000				27,112,000	712,000	1,324,000	1,300,000	29,148,000
Acquisition of processing equipment and fixed assets					573,000																						328,000		233,000
Net gain on securities sold or called		$ 56,000		$ 56,000