Derivatives (Derivatives associated with legacy Mortgage Servicing Activities) (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Forwards And Futures [Member] Retained Interest [Member] Hedging Instruments [Member]	Jun. 30, 2013 Forwards And Futures [Member] Retained Interest [Member] Hedging Instruments [Member]	Jun. 30, 2013 Interest Rate Swaps And Swaptions [Member] Retained Interest [Member] Hedging Instruments [Member]	Jun. 30, 2013 Interest Rate Swaps And Swaptions [Member] Retained Interest [Member] Hedging Instruments [Member]	Jun. 30, 2013 Mortgage Servicing Rights [Member] Retained Interest [Member] Hedged Items [Member]	Jun. 30, 2013 Mortgage Servicing Rights [Member] Retained Interest [Member] Hedged Items [Member]	Jun. 30, 2013 Other Retained Interests [Member] Retained Interest [Member] Hedged Items [Member]	Jun. 30, 2013 Other Retained Interests [Member] Retained Interest [Member] Hedged Items [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional					$ 35,000	$ 35,000	$ 407,000	$ 407,000
Assets					92	92	168	168
Liabilities					459	459	3,376	3,376
Gains/(Losses)					(2,795)	(3,206)	(6,314)	(5,580)
Total MSR recognized by FHN	3,197	72,793	113,853	114,311					111,207	111,207
Fair value of retained interests	1,150,280	801,718	1,267,348								15,872	15,872
Gains/(Losses)									$ 9,153	$ 10,330	$ 1,313	$ 1,794