Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Summary of Income Before Provision for Income Taxes

Following is a summary of the income before provision for income taxes (in thousands):

Years Ended December 31,	2018			2017		2016
Domestic	$	70,071		$	104,250	$	96,326
Foreign		(5,916	)		213		36
Total income before provision for income taxes	$	64,155		$	104,463	$	96,362

Summary of Provision for Income Taxes

Following is a summary of the provision for income taxes (in thousands):

Years Ended December 31,	2018			2017			2016
Federal:
Current	$	(11,140	)	$	27,889		$	15,632
Deferred		18,673			(4,383	)		9,898
Total federal		7,533			23,506			25,530
State:
Current		1,147			5,520			4,567
Deferred		1,888			(338	)		19
Total state		3,035			5,182			4,586
Foreign:
Current		381			(12	)		25
Deferred		(535	)		(14	)		21
Total foreign		(154	)		(26	)		46
Total provision for income taxes	$	10,414		$	28,662		$	30,162

Schedule of Effective Income Tax Rate Reconciliation

Following is a reconciliation of our provision for income taxes based on the Federal statutory tax rate to our effective tax rate (dollars in thousands):

Years Ended December 31,	2018					2017					2016
Federal statutory tax	$	13,472		21.0	%	$	36,562		35.0	%	$	33,728		35.0	%
State taxes, net of federal tax benefit		3,305		5.2			3,814		3.7			2,990		3.1
Foreign taxes		(190	)	(0.3	)		—		—			—		—
Percentage depletion deduction		(951	)	(1.5	)		(1,368	)	(1.3	)		(1,352	)	(1.4	)
Domestic production activities deduction		—		—			(2,765	)	(2.7	)		(1,624	)	(1.7	)
Non-controlling interests		(2,368	)	(3.7	)		(2,346	)	(2.3	)		(3,177	)	(3.3	)
Nondeductible expenses		4,842		7.5			1,128		1.1			1,094		1.1
Changes in uncertain tax positions		(772	)	(1.2	)		—		—			—		—
Capital loss expiration		8,480		13.2			—		—			—		—
Valuation allowance		(6,852	)	(10.7	)		—		—			—		—
Tax Cuts and Jobs Act of 2017		(7,980	)	(12.4	)		(3,664	)	(3.5	)		—		—
Other		(572	)	(0.9	)		(2,699	)	(2.6	)		(1,497	)	(1.5	)
Total	$	10,414		16.2	%	$	28,662		27.4	%	$	30,162		31.3	%

Summary of Deferred Tax Assets and Liabilities

Following is a summary of the deferred tax assets and liabilities (in thousands):

December 31,	2018			2017
Long-term deferred tax assets:
Receivables	$	2,723		$	526
Inventory		90			1,513
Insurance		11,084			7,401
Deferred compensation		10,441			8,985
Other accrued liabilities		1,906			1,525
Accrued compensation		3,803			1,738
Other		3,520			1,379
Net operating loss carryforwards		67,944			2,614
Valuation allowance		(31,823	)		(2,471	)
Total long-term deferred tax assets		69,688			23,210
Long-term deferred tax liabilities:
Property and equipment		49,728			16,832
Contract income recognition		21,359			7,739
Total long-term deferred tax liabilities		71,087			24,571
Net long-term deferred tax liabilities	$	(1,399	)	$	(1,361	)

Summary of Net Operating Loss Carryforwards

The following is a summary of the net operating loss carryforwards at December 31, 2018 (in thousands):

	Expiration	Gross Carryforward		Tax Effected Carryforward
Federal net operating loss carryforwards	2032-2036	$	170,560	$	35,818
State net operating loss carryforwards	2019-2036		281,332		15,010
Foreign tax loss carryforwards	2019-2033		57,771		17,116
Total net operating loss carryforwards at December 31, 2018				$	67,944

Summary of Change in Valuation Allowance

The following is a summary of the change in valuation allowance (in thousands):

December 31,	2018			2017		2016
Beginning balance	$	2,471		$	2,153	$	641
Additions due to acquisitions		36,410			—		—
(Deductions) additions, net		(7,058	)		318		1,512
Ending balance	$	31,823		$	2,471	$	2,153

Summary of Reconciliation of Unrecognized Tax Benefits

The following is a tabular reconciliation of unrecognized tax benefits (in thousands) the balance of which is included in other long-term liabilities and other current liabilities in the consolidated balance sheets:

December 31,	2018			2017			2016
Beginning balance	$	3,171		$	3,262		$	1,578
Gross increases - acquisitions		20,153			—			—
Gross increases – current period tax positions		36			—			1,902
Gross decreases – current period tax positions		(3	)		(73	)		(125	)
Gross increases – prior period tax positions		2			1			2
Gross decreases – prior period tax positions		(195	)		(6	)		(5	)
Settlements with taxing authorities/lapse of statute of limitations		(781	)		(13	)		(90	)
Ending balance	$	22,383		$	3,171		$	3,262