Mortgage Servicing Rights (Narrative) (Details) (USD $)											3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013 Capitalized Msr [Member]	Jun. 30, 2012 Capitalized Msr [Member]	Jun. 30, 2013 Mortgage Loans Serviced For Others [Member]	Jun. 30, 2012 Mortgage Loans Serviced For Others [Member]	Jun. 30, 2013 Transferred To Third Parties [Member]	Jun. 30, 2012 Transferred To Third Parties [Member]	Jun. 30, 2013 Mortgage Banking Income [Member]	Jun. 30, 2012 Mortgage Banking Income [Member]	Jun. 30, 2013 Mortgage Banking Income [Member]	Jun. 30, 2012 Mortgage Banking Income [Member]
Participating Mortgage Loans [Line Items]
Total MSR recognized by FHN	$ 113,853,000	$ 114,311,000	$ 129,291,000	$ 144,069,000			$ 1,400,000	$ 1,900,000	$ 12,300,000	$ 12,400,000
Unpaid principal of mortgage loans serviced by FHN					16,000,000,000	21,000,000,000	300,000,000	400,000,000
Servicing, late, and other ancillary fees											$ 12,300,000	$ 15,000,000	$ 24,400,000	$ 32,200,000