Pension, Savings, And Other Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule of Actuarial Assumptions Used

The actuarial assumptions used in the defined benefit pension plans and other employee benefit plans were as follows:

	Benefit Obligations			Net Periodic Benefit Cost
	2017	2016	2015	2017	2016	2015
Discount rate
Qualified pension	3.76%	4.39%	4.68%	4.37%	4.69%	4.30%
Nonqualified pension	3.59%	4.07%	4.33%	4.07%	4.34%	4.00%
Other nonqualified pension	3.19%	3.39%	3.57%	3.39%	3.57%	3.35%
Postretirement benefits	3.37% - 3.87%	3.67% - 4.57%	3.76% - 4.87%	3.68% - 4.57%	3.84% - 4.87%	3.45% - 4.45%
Expected long-term rate of return
Qualified pension/ postretirement benefits	4.20%	4.50%	6.00%	4.50%	6.00%	5.85%
Postretirement benefit (retirees post January 1, 1993)	5.95%	6.00%	6.15%	6.00%	6.15%	6.35%
Postretirement benefit (retirees prior to January 1, 1993)	2.15%	2.15%	2.10%	2.15%	2.10%	2.30%

Schedule of Plan's Benefit Obligations and Plan Assets

The following tables set forth the plans’ benefit obligations and plan assets for 2017 and 2016:

(Dollars in thousands)	Total Pension Benefits						Other Benefits
	2017			2016			2017			2016
Change in benefit obligation
Benefit obligation, beginning of year	$	804,542		$	816,529		$	35,403		$	33,166
Service cost	37			39			107			110
Interest cost	29,380			31,216			1,305			1,292
Actuarial (gain)/loss	63,876			12,733			3,733			2,110
Actual benefits paid (a)	(56,951		)	(55,975		)	(986		)	(1,275		)
Benefit obligation, end of year	$	840,884		$	804,542		$	39,562		$	35,403
Change in plan assets
Fair value of plan assets, beginning of year	$	778,872		$	638,169		$	16,717		$	16,128
Actual return on plan assets	84,534			27,448			2,458			991
Employer contributions	4,789			169,230			564			873
Actual benefits paid – settlement payments	—			—			(986		)	(1,275		)
Actual benefits paid – other payments	(56,951		)	(55,975		)	—			—
Fair value of plan assets, end of year	$	811,244		$	778,872		$	18,753		$	16,717
Funded status of the plans	$	(29,640	)	$	(25,670	)	$	(20,809	)	$	(18,686	)
Amounts recognized in the Statements of Condition
Other assets	$	11,238		$	18,104		$	15,254		$	13,050
Other liabilities	(40,878		)	(43,774		)	(36,063		)	(31,736		)
Net asset/(liability) at end of year	$	(29,640	)	$	(25,670	)	$	(20,809	)	$	(18,686	)

(a) 2017 and 2016 amounts are higher than historical trends due to the settlements of certain terminated, vested participants in the qualified pension plan that occurred during these years.

Schedule of Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the plan years 2017, 2016 and 2015 are as follows:

(Dollars in thousands)	Total Pension Benefits									Other Benefits
	2017			2016			2015			2017			2016			2015
Components of net periodic benefit cost
Service cost	$	37		$	39		$	40		$	107		$	110		$	146
Interest cost	29,380			31,216			36,424			1,305			1,292			1,413
Expected return on plan assets	(36,015		)	(39,123		)	(37,516		)	(947		)	(913		)	(956		)
Amortization of unrecognized:
Prior service cost/(credit)	52			196			333			95			170			(830		)
Actuarial (gain)/loss	9,521			8,141			10,103			(567		)	(810		)	(1,014		)
Net periodic benefit cost	2,975			469			9,384			(7		)	(151		)	(1,241		)
ASC 715 curtailment (income) (a)	—			—			—			—			—			(8,283		)
ASC 715 settlement expense	43			—			—			—			—			—
Total periodic benefit costs	$	3,018		$	469		$	9,384		$	(7	)	$	(151	)	$	(9,524	)

(a) In 2015, an announced revision to the retiree medical plan triggered curtailment accounting. In accordance with its practice, FHN performed a remeasurement of the plan in conjunction with the curtailment and realized a curtailment gain.

Schedule of Defined Benefit Plan Balances Reflected in AOCI on Pre-tax Basis

Balances reflected in accumulated other comprehensive income on a pre-tax basis for the years ended December 31, 2017 and 2016 consist of:

(Dollars in thousands)	Total Pension Benefits				Other Benefits
	2017		2016		2017			2016
Amounts recognized in accumulated other comprehensive income
Prior service cost/(credit)	$	—	$	52	$	—		$	95
Net actuarial (gain)/loss	385,517		379,724		(5,093		)	(8,076		)
Total	$	385,517	$	379,776	$	(5,093	)	$	(7,981	)

Schedule of Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income on Pre-tax Basis

The pre-tax amounts recognized in other comprehensive income during 2017 and 2016 were as follows:

(Dollars in thousands)	Total Pension Benefits						Other Benefits
	2017			2016			2017			2016
Changes in plan assets and benefit obligation recognized in other comprehensive income
Net actuarial (gain)/loss arising during measurement period	$	15,357		$	24,408		$	2,222		$	2,032
Items amortized during the measurement period:
Prior service credit/(cost)	(52		)	(196		)	(95		)	(170		)
Net actuarial gain/(loss)	(9,521		)	(8,141		)	567			810
Total recognized in other comprehensive income	$	5,784		$	16,071		$	2,694		$	2,672

Schedule of Expected Benefit Payments

The following table provides detail on expected benefit payments, which reflect expected future service, as appropriate:

(Dollars in thousands)	Pension Benefits		Other Benefits
2018	$	36,117	$	2,543
2019	38,554		1,590
2020	40,784		1,647
2021	42,536		1,710
2022	43,381		1,775
2023-2027	234,305		9,963

Schedule of Fair Value of Pension Plan Assets

The fair value of FHN’s pension plan assets at December 31, 2017 and 2016, by asset category classified using the Fair Value measurement hierarchy is shown in the table below. See Note 24 – Fair Value of Assets and Liabilities for more details about Fair Value measurements.

(Dollars in thousands)	December 31, 2017
	Level 1		Level 2		Level 3		Total
Cash equivalents and money market funds	$	21,152	$	—	$	—	$	21,152
Fixed income securities:
U.S. treasuries	—		27,173		—		27,173
Corporate, municipal and foreign bonds	—		762,919		—		762,919
Total	$	21,152	$	790,092	$	—	$	811,244

(Dollars in thousands)	December 31, 2016
	Level 1		Level 2		Level 3		Total
Cash equivalents and money market funds	$	23,815	$	—	$	—	$	23,815
Fixed income securities:
U.S. treasuries	—		30,576		—		30,576
Corporate, municipal and foreign bonds	—		505,374		—		505,374
Common and collective funds:
Fixed income	—		219,107		—		219,107
Total	$	23,815	$	755,057	$	—	$	778,872

Schedule of Fair Value of Retiree Medical Plan Assets

The fair value of FHN’s retiree medical plan assets at December 31, 2017 and 2016 by asset category are as follows:

(Dollars in thousands)	December 31, 2017
	Level 1		Level 2		Level 3		Total
Cash equivalents and money market funds	$	364	$	—	$	—	$	364
Mutual funds:
Equity mutual funds	11,402		—		—		11,402
Fixed income mutual funds	6,987		—		—		6,987
Total	$	18,753	$	—	$	—	$	18,753

(Dollars in thousands)	December 31, 2016
	Level 1		Level 2		Level 3		Total
Cash equivalents and money market funds	$	626	$	—	$	—	$	626
Mutual funds:
Equity mutual funds	10,443		—		—		10,443
Fixed income mutual funds	5,648		—		—		5,648
Total	$	16,717	$	—	$	—	$	16,717