CONSOLIDATED CONDENSED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Preferred Stock	Common Stock	Capital Surplus	Undivided Profits	Accumulated Other Comprehensive Income/(Loss)		Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2018-02						$ 57,546	$ (57,546)	[1]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-01 and 2017-12							(211)
Balance, adjusted for ASU 2018-02		$ 4,580,488	$ 95,624	$ 204,211	$ 3,147,613	1,160,434	(322,825)	[1]	$ 295,431
Balance, beginning of period (in shares) at Dec. 31, 2017				326,736
Balance, beginning of period at Dec. 31, 2017		4,580,488	95,624	$ 204,211	3,147,613	1,102,888	(265,279)	[1]	295,431
Beginning balance, as adjusted at Dec. 31, 2017							(323,036)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		94,994				92,174			2,820
Other comprehensive income/(loss)		(67,049)					(67,049)	[1]
Comprehensive income/(loss)		27,945				92,174	(67,049)	[1]	2,820
Cash dividends declared:
Preferred stock		(1,550)				(1,550)
Common stock		(39,681)				(39,681)
Common stock repurchased (in shares)				(110)
Common stock repurchased (b)		(2,185)		$ (70)	(2,115)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				569
Stock options and restricted stock - equity awards		4,376		$ 356	4,020
Acquisition equity adjustment (in shares)				(1)
Acquisition equity adjustment		(18)		$ (1)	(17)
Stock-based compensation expense		5,906			5,906
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,820)							(2,820)
Balance, end of period (in shares) at Mar. 31, 2018				327,194
Balance, end of period at Mar. 31, 2018		4,572,528	95,624	$ 204,496	3,155,407	1,211,655	(390,085)	[1]	295,431
Balance, beginning of period (in shares) at Dec. 31, 2018				318,573
Balance, beginning of period at Dec. 31, 2018		4,785,380	95,624	$ 199,108	3,029,425	1,542,408	(376,616)	[2]	295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		103,405				100,585			2,820
Other comprehensive income/(loss)		55,465					55,465	[2]
Comprehensive income/(loss)		158,870				100,585	55,465	[2]	2,820
Cash dividends declared:
Preferred stock		(1,550)				(1,550)
Common stock		(44,864)				(44,864)
Common stock repurchased (in shares)	[3]			(3,594)
Common stock repurchased (b)	[3]	(53,436)		$ (2,246)	(51,190)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				382
Stock options and restricted stock - equity awards		520		$ 239	281
Stock-based compensation expense		5,432			5,432
Dividends declared - noncontrolling interest of subsidiary preferred stock		(2,820)							(2,820)
Balance, end of period (in shares) at Mar. 31, 2019				315,361
Balance, end of period at Mar. 31, 2019		$ 4,846,521	$ 95,624	$ 197,101	$ 2,983,948	$ 1,595,568	$ (321,151)	[2]	$ 295,431

[1] Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of Other comprehensive income/(loss) have been attributed solely to FHN as the controlling interest holder.

[2] Due to the nature of the preferred stock issued by FHN and its subsidiaries, all components of Other comprehensive income/(loss) have been attributed solely to FHN as the controlling interest holder.

[3] Includes $51.5 million repurchased under share repurchase programs.