Regulatory Capital And Restrictions (Tables)

12 Months Ended

Dec. 31, 2011

Regulatory Capital And Restrictions [Abstract]

Summary Of Actual Capital Amounts And Ratios

(Dollars in thousands)	First Horizon National Corporation							First Tennessee Bank National Association
	Amount				Ratio			Amount				Ratio
On December 31, 2011:
Actual:
Total Capital		$	3,602,271			17.99	%		$	3,976,672			20.05	%
Tier 1 Capital			2,850,452			14.23				3,247,268			16.37
Leverage			2,850,452			11.41				3,247,268			13.12
For Capital Adequacy Purposes:
Total Capital			1,602,113	≥		8.00				1,586,752	≥		8.00
Tier 1 Capital			801,056	≥		4.00				793,376	≥		4.00
Leverage			998,891	≥		4.00				990,281	≥		4.00
To Be Well Capitalized Under Prompt Corrective Action Provisions:
Total Capital										1,983,440	≥		10.00
Tier 1 Capital										1,190,064	≥		6.00
Leverage										1,237,851	≥		5.00
On December 31, 2010:
Actual:
Total Capital		$	3,749,586			18.65	%		$	4,032,289			20.26	%
Tier 1 Capital			2,812,471			13.99				3,137,624			15.76
Leverage			2,812,471			10.96				3,137,624			12.33
For Capital Adequacy Purposes:
Total Capital			1,608,222	≥		8.00				1,592,416	≥		8.00
Tier 1 Capital			804,111	≥		4.00				796,208	≥		4.00
Leverage			1,026,597	≥		4.00				1,018,136	≥		4.00
To Be Well Capitalized Under Prompt Corrective Action Provisions:
Total Capital										1,990,520	≥		10.00
Tier 1 Capital										1,194,312	≥		6.00
Leverage										1,272,670	≥		5.00