Coal Workers' Pneumoconiosis and Workers' Compensation (Tables)

12 Months Ended

Dec. 31, 2018

The reconciliation of changes in the benefit obligation, plan assets and funded status of these plans at December 31, 2018 and 2017 is as follows:



	Pension Benefits						Other Postretirement Benefits
	at December 31,						at December 31,
	2018			2017			2018			2017
Change in benefit obligation:
Benefit obligation at beginning of period	$	733,990		$	735,177		$	591,563		$	700,085
Service cost	1,150			2,948			—			—
Interest cost	23,505			25,265			18,706			23,945
Actuarial (gain) loss	(60,351		)	35,281			(101,259		)	(101,379		)
Plan settlements	—			(29,142		)	—			—
Benefits and other payments	(54,152		)	(35,539		)	(35,419		)	(31,088		)
Benefit obligation at end of period	$	644,142		$	733,990		$	473,591		$	591,563

Change in plan assets:
Fair value of plan assets at beginning of period	$	679,245		$	632,434		$	—		$	—
Actual return on plan assets	(48,470		)	110,311			—			—
Company contributions	1,724			1,181			35,419			31,088
Benefits and other payments	(54,152		)	(35,539		)	(35,419		)	(31,088		)
Plan settlements	—			(29,142		)	—			—
Fair value of plan assets at end of period	$	578,347		$	679,245		$	—		$	—

Funded status:
Current liabilities	$	(1,623	)	$	(1,785	)	$	(32,345	)	$	(37,464	)
Noncurrent liabilities	(64,172		)	(52,960		)	(441,246		)	(554,099		)
Net obligation recognized	$	(65,795	)	$	(54,745	)	$	(473,591	)	$	(591,563	)

Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss	$	263,229		$	243,456		$	184,438		$	301,901
Prior service credit	(367		)	(869		)	(23,354		)	(25,759		)
Net amount recognized (before tax effect)	$	262,862		$	242,587		$	161,084		$	276,142

The reconciliation of changes in the benefit obligation and funded status of these plans at December 31, 2018 and 2017 is as follows:



	CWP						Workers' Compensation
	at December 31,						at December 31,
	2018			2017			2018			2017
Change in benefit obligation:
Benefit obligation at beginning of period	$	162,840		$	118,836		$	78,528		$	78,099
State administrative fees and insurance bond premiums	—			—			2,671			3,198
Service cost	6,650			5,122			6,230			5,734
Interest cost	5,245			4,050			2,283			2,321
Actuarial loss (gain)	14,832			47,939			(5,134		)	3,553
Benefits paid	(12,379		)	(13,107		)	(13,592		)	(14,377		)
Benefit obligation at end of period	$	177,188		$	162,840		$	70,986		$	78,528

Funded status:
Current assets	$	—		$	—		$	1,384		$	1,437
Current liabilities	(12,187		)	(12,972		)	(12,628		)	(13,317		)
Noncurrent liabilities	(165,001		)	(149,868		)	(59,742		)	(66,648		)
Net obligation recognized	$	(177,188	)	$	(162,840	)	$	(70,986	)	$	(78,528	)

Amounts recognized in accumulated other comprehensive income consist of:
Net actuarial loss (gain)	$	8,542		$	(7,144	)	$	(13,561	)	$	(8,505	)
Net amount recognized (before tax effect)	$	8,542		$	(7,144	)	$	(13,561	)	$	(8,505	)

The components of net periodic benefit cost (credit) are as follows:



	Pension Benefits									Other Postretirement Benefits
	For the Years Ended December 31,									For the Years Ended December 31,
	2018			2017			2016			2018			2017			2016
Components of net periodic benefit cost (credit):
Service cost	$	1,150		$	2,948		$	1,533		$	—		$	—		$	—
Interest cost	23,505			25,265			25,048			18,706			23,945			24,241
Expected return on plan assets	(40,370		)	(42,383		)	(46,674		)	—			—			—
Amortization of prior service credits	(502		)	(502		)	(502		)	(2,405		)	(2,405		)	—
Recognized net actuarial loss	8,715			8,896			9,163			16,205			23,112			19,168
Settlement loss	—			10,153			22,196			—			—			—
Net periodic benefit (credit) cost	$	(7,502	)	$	4,377		$	10,764		$	32,506		$	44,652		$	43,409

The components of the net periodic cost are as follows:



	CWP									Workers’ Compensation
	For the Years Ended									For the Years Ended
	December 31,									December 31,
	2018			2017			2016			2018			2017			2016
Service cost	$	6,650		$	5,122		$	4,327		$	6,230		$	5,734		$	7,466
Interest cost	5,245			4,050			4,283			2,283			2,321			2,499
Recognized net actuarial gain	(853		)	(7,631		)	(4,948		)	(79		)	(598		)	(395		)
State administrative fees and insurance bond premiums	—			—			—			2,671			3,198			3,199
Curtailment gain	—			—			(1,307		)	—			—			—
Net periodic cost	$	11,042		$	1,541		$	2,355		$	11,105		$	10,655		$	12,769

Amounts included in accumulated other comprehensive loss which are expected to be recognized in 2019 net periodic benefit costs:



				Other
	Pension			Postretirement
	Benefits			Benefits
Prior service credit recognition	$	(366	)	$	(2,405	)
Actuarial loss recognition	$	5,958		$	9,262

The following are amounts included in accumulated other comprehensive income that are expected to be recognized in 2019 net periodic benefit costs:



			Workers'
	CWP		Compensation
	Benefits		Benefits
Actuarial loss (gain) recognition	$	1,016	$	(774	)

The weighted-average assumptions used to determine net periodic benefit costs are as follows:



	Pension Benefits						Other Postretirement Benefits
	For the Years Ended						For the Years Ended
	December 31,						December 31,
	2018		2017		2016		2018		2017		2016
Discount rate	3.69	%	4.27	%	4.52	%	3.65	%	4.22	%	4.50	%
Expected long-term return on plan assets	6.90	%	6.90	%	7.25	%	—		—		—
Rate of compensation increase	3.73	%	3.90	%	3.80	%	—		—		—

The weighted-average assumptions used to determine benefit obligations are as follows:



	Pension Benefits				Other Postretirement Benefits
	at December 31,				at December 31,
	2018		2017		2018		2017
Discount rate	4.34	%	3.65	%	4.34	%	3.65	%
Rate of compensation increase	3.73	%	3.73	%	—		—

The weighted-average discount rates used to determine benefit obligations and net periodic cost are as follows:

The following benefit payments, reflecting expected future service, are expected to be paid:

The following benefit payments, which reflect expected future claims as appropriate, are expected to be paid: