Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The components of income tax expense (benefit) were as follows:

	For The Years Ended December 31,
	2019			2018			2017
Current:
U.S. Federal	$	15,905		$	20,634		$	65,856
U.S. State	4,717			3,240			2,732
Non-U.S.	1,336			1,436			2,030
	21,958			25,310			70,618
Deferred:
U.S. Federal	(9,386		)	(7,509		)	17,397
U.S. State	(8,033		)	(8,973		)	(787		)
	(17,419		)	(16,482		)	16,610
Total Income Tax Expense	$	4,539		$	8,828		$	87,228

Schedule of Reconciliation of Income Tax Expense (Benefit)

A reconciliation of income tax expense (benefit) and the amount computed by applying the statutory federal income tax rate of 21% to income from operations before income tax is:

	For the Years Ended December 31,
	2019					2018					2017
	Amount			Percent		Amount			Percent		Amount			Percent
Statutory U.S. federal income tax rate	$	20,600		21.0	%	$	39,399		21.0	%	$	59,429		35.0	%
State income taxes, net of federal tax benefit	3,125			3.2		3,240			1.7		1,264			0.7
Foreign income taxes	1,336			1.4		1,436			0.8		—			—
Excess tax depletion	(13,141		)	(13.4	)	(20,873		)	(11.1	)	(24,216		)	(14.3	)
Effect of domestic production activities	—			—		—			—		(6,493		)	(3.8	)
Effect of change in U.S. tax law	—			—		2,777			1.5		58,558			34.5
Excess compensation	1,849			1.9		974			0.5		—			—
Effect of valuation allowance	1,400			1.4		(1,379		)	(0.7	)	1,379			0.8
Tax credits	(2,536		)	(2.6	)	(980		)	(0.5	)	—			—
Non-controlling interest	(3,687		)	(3.8	)	(5,420		)	(2.9	)	—			—
State rate change and prior period adjustments	(5,745		)	(5.9	)	(8,223		)	(4.4	)	—			—
Other	1,338			1.4		(2,123		)	(1.1	)	(2,693		)	(1.6	)
Income Tax Expense / Effective Rate	$	4,539		4.6	%	$	8,828		4.8	%	$	87,228		51.3	%

Schedule of Significant Components of Deferred Tax Assets and Liabilities

Significant components of deferred tax assets and liabilities were as follows:

	December 31,
	2019			2018
Deferred Tax Asset:
Postretirement benefits other than pensions	$	110,504		$	108,603
Asset retirement obligations	60,260			57,956
Pneumoconiosis benefits	52,521			41,632
Mine subsidence	17,110			15,097
Financing	16,806			9,387
Workers' compensation	16,750			16,016
Salary retirement	14,761			15,855
Operating lease liabilities	14,757			—
State bonus, net of Federal	7,042			6,042
Long-term disability	3,031			2,798
Foreign tax credits	1,400			—
Other	6,297			6,669
Total Deferred Tax Asset	321,239			280,055
Valuation Allowance	(1,400		)	—
Net Deferred Tax Asset	319,839			280,055
Deferred Tax Liability:
Property, plant and equipment	(173,849		)	(175,558		)
Equity Partnerships	(17,028		)	(16,638		)
Right of use assets	(14,757		)	—
Advance mining royalties	(10,700		)	(10,314		)
Total Deferred Tax Liability	(216,334		)	(202,510		)
Net Deferred Tax Asset	$	103,505		$	77,545