Derivatives (Derivatives associated with legacy Mortgage Servicing Activities) (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Forwards And Futures [Member] Retained Interest [Member] Hedging Instruments [Member]	Mar. 31, 2013 Interest Rate Swaps And Swaptions [Member] Retained Interest [Member] Hedging Instruments [Member]	Mar. 31, 2013 Mortgage Servicing Rights [Member] Retained Interest [Member] Hedged Items [Member]	Mar. 31, 2013 Other Retained Interests [Member] Retained Interest [Member] Hedged Items [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional					$ 124,000	$ 735,000
Assets					162	1,956
Liabilities					0	215
Gains/(Losses)					(411)	735
Total MSR recognized by FHN	4,687	72,793	109,102	114,311			106,329
Fair value of retained interests	1,194,749	801,718	1,397,746					16,454
Gains/(Losses)							$ 1,177	$ 481