CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands		Total		Common Stock	Preferred Stock	Capital Surplus	Undivided Profits	Accumulated Other Comprehensive Income/(Loss)	[1]	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-09						$ 230	$ (230)
Balance as adjusted		$ 2,705,084		$ 146,015	$ 95,624	1,386,866	1,028,802	$ (247,654)		$ 295,431
Beginning balance (in shares) at Dec. 31, 2016				233,624
Beginning balance at Dec. 31, 2016		2,705,084		$ 146,015	95,624	1,386,636	1,029,032	(247,654)		295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)		176,980					165,515			11,465
Other comprehensive income/(loss)		(17,625)						(17,625)
Comprehensive income/(loss)		159,355					165,515	(17,625)		11,465
Cash dividends declared:
Preferred stock		(6,200)					(6,200)
Common stock		(85,174)	[2]				(85,174)
Common stock repurchased (in shares)				(297)
Common stock repurchased		(5,554)		$ (185)		(5,369)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				1,107
Stock options and restricted stock - equity awards		6,092		$ 692		5,400
Equity issued for acquisitions (in shares)				92,302
Equity issued for acquisitions		1,797,723		$ 57,689		1,740,034
Stock-based compensation expense		20,627				20,627
Dividends declared - noncontrolling interest of subsidiary preferred stock		(11,465)								(11,465)
Other						55	(55)
Ending balance (in shares) at Dec. 31, 2017				326,736
Ending balance at Dec. 31, 2017		4,580,488		$ 204,211	95,624	3,147,613	1,102,888	(265,279)		295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2018-02							57,546	(57,546)
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-01 and 2017-12		67					278	(211)
Balance, as adjusted for ASU 2018-02		4,580,488		204,211	95,624	3,147,613	1,160,434	(322,825)		295,431
Balance as adjusted		4,580,555		$ 204,211	95,624	3,147,613	1,160,712	(323,036)		295,431
Net income/(loss)		556,507					545,042			11,465
Other comprehensive income/(loss)		(53,580)						(53,580)
Comprehensive income/(loss)		502,927					545,042	(53,580)		11,465
Cash dividends declared:
Preferred stock		(6,200)					(6,200)
Common stock		(157,146)					(157,146)
Common stock repurchased (in shares)	[2]			(6,708)
Common stock repurchased	[2]	(104,768)		$ (4,192)		(100,576)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				926
Stock options and restricted stock - equity awards		4,480		$ 578		3,902
Equity issued for acquisitions (in shares)	[3]			(2,374)
Equity issued for acquisitions	[3]	(46,041)		$ (1,484)		(44,557)
Stock-based compensation expense		23,171				23,171
Dividends declared - noncontrolling interest of subsidiary preferred stock		(11,465)								(11,465)
Other (in shares)				(7)
Other		(133)		$ (5)		(128)
Ending balance (in shares) at Dec. 31, 2018				318,573
Ending balance at Dec. 31, 2018		4,785,380		$ 199,108	95,624	3,029,425	1,542,408	(376,616)		295,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment to reflect adoption of ASU | Accounting Standards Update 2016-02		(1,011)					(1,011)
Balance as adjusted		4,784,369		$ 199,108	95,624	3,029,425	1,541,397	(376,616)		295,431
Net income/(loss)		452,373					440,908			11,465
Other comprehensive income/(loss)		137,008						137,008
Comprehensive income/(loss)		589,381					440,908	137,008		11,465
Cash dividends declared:
Preferred stock		(6,200)					(6,200)
Common stock		(177,663)					(177,663)
Common stock repurchased (in shares)	[2]			(9,100)
Common stock repurchased	[2]	(134,813)		$ (5,687)		(129,126)
Common stock issued for:
Stock options and restricted stock - equity awards (in shares)				1,996
Stock options and restricted stock - equity awards		9,669		$ 1,247		8,422
Stock-based compensation expense		22,730				22,730
Dividends declared - noncontrolling interest of subsidiary preferred stock		(11,465)								(11,465)
Ending balance (in shares) at Dec. 31, 2019				311,469
Ending balance at Dec. 31, 2019		$ 5,076,008		$ 194,668	$ 95,624	$ 2,931,451	$ 1,798,442	$ (239,608)		$ 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] 2019 and 2018 include $129.9 million and $99.4 million, respectively, repurchased under share repurchase programs.

[3] See Note 2- Acquisitions and Divestitures for additional information.