Master Netting And Similar Agreements (Tables)

12 Months Ended

Dec. 31, 2017

Offsetting [Abstract]

Securities Purchased Under Agreements To Resell And Collateral Pledged By Counterparties

The following table provides details of Securities purchased under agreements to resell as presented on the Consolidated Statements of Condition and collateral pledged by counterparties as of December 31:

							Gross amounts not offset in the Statements of Condition
(Dollars in thousands)	Gross amounts of recognized assets		Gross amounts offset in the Statements of Condition		Net amounts of assets presented in the Statements of Condition		Offsetting securities sold under agreements to repurchase			Securities collateral (not recognized on FHN’s Statements of Condition)			Net amount
Securities purchased under agreements to resell:
2017	$	725,609	$	—	$	725,609	$	(259	)	$	(720,036	)	$	5,314
2016	613,682		—		613,682		(1,628		)	(603,813		)	8,241

Securities Sold Under Agreements To Repurchase And Collateral Pledged By Company

The following table provides details of Securities sold under agreements to repurchase as presented on the Consolidated Statements of Condition and collateral pledged by FHN as of December 31:

							Gross amounts not offset in the Statements of Condition
(Dollars in thousands)	Gross amounts of recognized liabilities		Gross amounts offset in the Statements of Condition		Net amounts of liabilities presented in the Statements of Condition		Offsetting securities purchased under agreements to resell			Securities/ government guaranteed loans collateral			Net amount
Securities sold under agreements to repurchase:
2017	$	656,602	$	—	$	656,602	$	(259	)	$	(656,216	)	$	127
2016	453,053		—		453,053		(1,628		)	(451,414		)	11

Schedule of the Remaining Contractual Maturity by Collateral Type of Securities Sold Under Agreements To Repurchase

The following tables provide details, by collateral type, of the remaining contractual maturity of Securities sold under agreements to repurchase as of December 31:

	December 31, 2017
(Dollars in thousands)	Overnight and Continuous		Up to 30 Days		Total
Securities sold under agreements to repurchase:
U.S. treasuries	$	13,830	$	—	$	13,830
Government agency issued MBS	424,821		5,365		430,186
Government agency issued CMO	54,037		3,666		57,703
Government guaranteed loans (SBA and USDA)	154,883		—		154,883
Total Securities sold under agreements to repurchase	$	647,571	$	9,031	$	656,602
	December 31, 2016
(Dollars in thousands)	Overnight and Continuous		Up to 30 Days		Total
Securities sold under agreements to repurchase:
U.S. treasuries	$	14,864	$	—	$	14,864
Government agency issued MBS	421,771		—		421,771
Government agency issued CMO	—		16,418		16,418
Total Securities sold under agreements to repurchase	$	436,635	$	16,418	$	453,053