Mortgage Servicing Rights (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Participating Mortgage Loans [Line Items]
Total MSR recognized by FHN		$ 116,686,000	$ 2,880,000	$ 116,686,000	$ 72,793,000	$ 114,311,000
Percentage of single-family mortgage loans received as fees		0.29%
Percentage of outstanding balance generating for annual servicing inclusive excess interests		0.34%
Sale of MSR	68,500,000		(70,071,000)	0
Capitalized Msr [Member]
Participating Mortgage Loans [Line Items]
Unpaid principal of mortgage loans serviced by FHN		15,000,000,000		15,000,000,000
Transferred To Third Parties [Member]
Participating Mortgage Loans [Line Items]
Total MSR recognized by FHN		11,700,000		11,700,000
Mortgage Banking Income [Member]
Participating Mortgage Loans [Line Items]
Servicing, late, and other ancillary fees		$ 10,900,000	$ 20,900,000	$ 35,300,000