Income Taxes

The components of our income tax (provision) benefit were as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2017			2016			2015
Current:
Federal	$	(1,418	)	$	(2,103	)	$	(3,883	)
State	523			(675		)	(190		)
Total current	(895		)	(2,778		)	(4,073		)
Deferred:
Federal	3,722			777			5,011
State	118			80			(168		)
Total deferred	3,840			857			4,843
Total provision for (benefit from) income taxes⁽¹⁾	$	2,945		$	(1,921	)	$	770

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(1)	2016 includes a tax benefit of $0.8 million related to losses from our investment in Bencap, and is included in the loss from investment in unconsolidated affiliate category on the consolidated statements of operations.

A reconciliation of the provision for (benefit from) income taxes with amounts determined by applying the statutory U.S. federal income tax rate to income before income taxes was as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2017			2016			2015

Pre-tax net book income ⁽¹⁾	$	(3,427	)	$	4,434		$	(2,045	)

Statutory federal income tax (provision) benefit	$	1,165		$	(1,552	)	$	716
State income tax (provision) benefit	736			(387		)	(233		)
Federal statutory depletion	153			62			144
Federal tax rate adjustment	2,007			—			—
Valuation allowance	(1,038		)	—			—
Other	(78		)	(44		)	143
Total provision for (benefit from) income taxes	$	2,945		$	(1,921	)	$	770
Effective income tax rate ⁽²⁾	86		%	43		%	38		%

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(1)	2016 includes the pre-tax loss from investment in unconsolidated affiliate of $2.2 million.


(2)	Excluding the adjustment related to the federal tax rate change, the effective income tax rate for 2017 is 58 percent.

Deferred income taxes reflect the net difference between the financial statement carrying amounts and the underlying income tax basis in these items. The components of the federal deferred tax asset (liability) were as follows at the dates indicated (in thousands):



	December 31,
	2017			2016

Long-term deferred tax asset (liability): ⁽¹⁾
Prepaid and other insurance	$	(684	)	$	(1,058	)
Property	(2,497		)	(7,341		)
Investments in unconsolidated affiliates	623			606
Valuation allowance related to investments in unconsolidated affiliates	(623		)	—
Uniform capitalization	—			729
Other	(121		)	(93		)
Net long-term deferred tax liability	(3,302		)	(7,157		)
Net deferred tax liability	$	(3,302	)	$	(7,157	)

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(1)	Amounts as of December 31, 2017 have been revalued at 21 percent as a result of the enactment of the Tax Cuts and Jobs Act on December 22, 2017.

Financial statement recognition and measurement of positions taken, or expected to be taken, by an entity in its income tax returns must consider the uncertainty and judgment involved in the determination and filing of income taxes. Tax positions taken in an income tax return that are recognized in the financial statements must satisfy a more-likely-than-not recognition threshold, assuming that the tax position will be examined by taxing authorities with full knowledge of all relevant information. We have no significant unrecognized tax benefits. Interest and penalties associated with income tax liabilities are classified as income tax expense.

The earliest tax years remaining open for audit for federal and major states of operations are as follows:



	Earliest Open
	Tax Year

Federal	2013
Texas	2013
Louisiana	2014
Michigan	2013

Other Matters

The Tax Cuts and Jobs Act (the “Act”) was signed into law on December 22, 2017. The Act changed many aspects of U.S. corporate income taxation and included a reduction of the corporate income tax rate from 35 percent to 21 percent, implementation of a territorial tax system and imposition of a tax on deemed repatriated earnings of foreign subsidiaries. We recognized the tax effects of the Act in the year ended December 31, 2017 and recorded a $2.0 million tax benefit, which relates entirely to the remeasurement of deferred tax liabilities to the 21 percent tax rate. Upon completion of our 2017 U.S. income tax return in 2018, we may identify additional remeasurement adjustments to our recorded deferred tax liabilities. We will continue to assess our income taxes as future guidance is issued but do not currently anticipate significant revisions will be necessary. Any such revisions will be treated in accordance with the measurement period guidance outlined in Staff Accounting Bulletin No. 118.