Mortgage Servicing Rights (Narrative) (Details) (USD $)											3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013 Capitalized Msr [Member]	Sep. 30, 2012 Capitalized Msr [Member]	Sep. 30, 2013 Mortgage Loans Serviced For Others [Member]	Sep. 30, 2012 Mortgage Loans Serviced For Others [Member]	Sep. 30, 2013 Transferred To Third Parties [Member]	Sep. 30, 2012 Transferred To Third Parties [Member]	Sep. 30, 2013 Mortgage Banking Income [Member]	Sep. 30, 2012 Mortgage Banking Income [Member]	Sep. 30, 2013 Mortgage Banking Income [Member]	Sep. 30, 2012 Mortgage Banking Income [Member]
Participating Mortgage Loans [Line Items]
Total MSR recognized by FHN	$ 116,686,000	$ 114,311,000	$ 120,537,000	$ 144,069,000			$ 1,400,000	$ 1,700,000	$ 11,700,000	$ 11,600,000
Unpaid principal of mortgage loans serviced by FHN					15,000,000,000	20,000,000,000	200,000,000	400,000,000
Servicing, late, and other ancillary fees											$ 10,900,000	$ 13,800,000	$ 35,300,000	$ 46,000,000