Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Taxes

Schedule of components of provision (benefit) for income taxes

Years ended December 31,	2017			2016			2015
(in thousands)
Current provision (benefit):
Federal	$	95,995		$	(43,993	)	$	(24,727	)
State		13,966			(24,479	)		(3,638	)
Foreign		2,953			4,567			7,898
Deferred provision (benefit):
Federal		(39,710	)		(31,505	)		(31,178	)
State		(2,899	)		(2,704	)		(1,835	)
Total income tax provision (benefit)	$	70,305		$	(98,114	)	$	(53,480	)

Schedule of reconciliation between the federal statutory rate and effective tax rate

Years ended December 31,	2017			2016			2015
Federal statutory rate		35.0	%		35.0	%		35.0	%
State income taxes, net of federal benefit		1.9			1.3			-
Tax credits		(0.7	)		0.1			0.3
Non-deductible expenses		2.0			(0.7	)		(1.3	)
Change in contingencies		-			6.6			—
Adjustments related to the Act		(8.3	)
Other		0.3			(1.3	)		0.9
Effective tax rate		30.2	%		41.0	%		34.9	%

Schedule of deferred tax assets and liabilities

December 31,	2017			2016
(in thousands)
Deferred tax assets:
Self-insurance	$	4,660		$	5,907
Pension		8,730			11,995
State net operating loss carryforwards		4,048			1,455
Bad debt		1,149			991
Accrued payroll		1,117			857
Stock-based compensation		3,612			5,847
Foreign tax credits		3,592			-
All others		1,681			2,483
Valuation allowance		(3,994	)		(356	)
Gross deferred tax assets		24,595			29,179
Deferred tax liabilities:
Depreciation		(53,119	)		(95,606	)
Goodwill amortization		(6,450	)		(9,340	)
Basis differences in consolidated limited liability company		(4,102	)		(5,281	)
Basis differences in joint ventures		(355	)		(396	)
All others		(6	)		(22	)
Gross deferred tax liabilities		(64,032	)		(110,645	)
Net deferred tax liabilities		(39,437	)	$	(81,466	)

Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits

	2017		2016
Balance at January 1	$	2,215,000	$	26,152,000
Additions based on tax positions related to the current year		-		-
Additions for tax positions of prior years		-		-
Reductions for tax positions of prior years		-		(23,937,000	)
Balance at December 31	$	2,215,000	$	2,215,000