Other Income And Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
All other income and commissions:
ATM interchange fees	$ 2,746		$ 2,627		$ 5,243		$ 5,011
Electronic banking fees	1,535		1,585		3,069		3,147
Deferred compensation	1,184	[1]	(278)	[1]	1,841	[1]	1,315	[1]
Letter of credit fees	1,173		1,196		2,836		2,695
Gain/(loss) on extinguishment of debt	0		0		(4,350)	[2]	0
Other	2,597		3,777		5,490		7,234
Total	9,235		8,907		14,129		19,402
All other expense:
Other insurance and taxes	3,209		3,076		6,269		6,122
Tax credit investments	3,032		2,989		5,527		5,961
Travel and entertainment	2,645		2,372		4,469		4,220
Customer relations	1,680		1,255		2,923		2,533
Employee training and dues	1,200		1,229		2,066		2,483
Miscellaneous loan costs	839		1,163		1,553		2,159
Supplies	804		705		1,920		1,760
Litigation and regulatory matters	(38,200)	[3]	900		(38,110)	[3]	6,070
Other	8,902		6,837		18,147		14,814
Total	(15,889)		20,526		4,764		46,122
Sentinel Litigation [Member] | Insurance Settlement
All other expense:
Litigation and regulatory matters	$ (38,600)				$ (38,600)

[1] Deferred compensation market value adjustments are mirrored by adjustments to employee compensation, incentives, and benefits expense.

[2] Six months ended June 30, 2014 loss is associated with the collapse of two HELOC securitization trusts.

[3] Three and six months ended June 30, 2014, include $38.6 million related to agreements with insurance companies for the recovery of expenses FHN incurred in connection with the Sentinel litigation matter which was settled in 2011.