Results of Operations for TCB Franchise (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
INTEREST INCOME:
Loans, including fees	$ 30,534	$ 29,843	$ 105,826	$ 118,004
Taxable investment securities	2,904	4,093	6,171	7,685
Total interest income	33,814	34,459	113,401	127,082
INTEREST EXPENSE:
Deposits	1,213	2,272	2,752	5,210
Total interest expense	5,502	7,630	11,869	16,282
Net interest income	28,312	26,829	101,532	110,800
Provision for loan losses	466	(439)	11,636	17,643
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	27,846	27,268	89,896	93,157
NON INTEREST INCOME:
Service charges on deposit accounts	3,286	3,736	6,589	7,160
Bargain purchase gain	(96)		27,803
Gain on sale of securities available for sale		1,907	56	1,907
Other	1,345	724	2,237	1,529
Total non interest income	14,086	15,368	120,895	102,680
NON INTEREST EXPENSES:
Salaries and employee benefits	14,313	13,250	31,284	30,489
Occupancy and equipment, net	5,144	5,001	11,218	11,298
Communication and transportation	961	878	3,622	3,387
Marketing and development	904	868	1,842	1,772
FDIC insurance expense	291	1,165	721	2,800
Data processing	1,195	817	2,416	1,565
Supplies	529	314	1,478	1,208
Other real estate owned expense	555	378	1,160	859
Other	1,469	1,327	4,759	4,692
Total non interest expenses	27,451	28,526	68,604	71,344
INCOME BEFORE INCOME TAX EXPENSE	14,481	14,110	142,187	124,493
Tennessee Commerce Bank ( "TCB" )
INTEREST INCOME:
Loans, including fees	885		1,643
Taxable investment securities	194		443
Total interest income	1,079		2,086
INTEREST EXPENSE:
Deposits	12		47
Total interest expense	12		47
Net interest income	1,067		2,039
Provision for loan losses
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	1,067		2,039
NON INTEREST INCOME:
Service charges on deposit accounts	10		24
Bargain purchase gain	(96)		27,803
Gain on sale of securities available for sale			56
Other	471		626
Total non interest income	385		28,509
NON INTEREST EXPENSES:
Salaries and employee benefits	1,015		2,009
Occupancy and equipment, net	378		586
Communication and transportation	95		160
Marketing and development	18		19
FDIC insurance expense	15		52
Data processing	301		607
Supplies	10		21
Other real estate owned expense	82		103
Other	338		780
Total non interest expenses	2,252		4,337
INCOME BEFORE INCOME TAX EXPENSE	$ (800)		$ 26,211