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Income Taxes
 3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes

A reconciliation of the statutory federal income tax provision (benefit) at the statutory rate to the actual provision for (benefit from) income taxes follows:

 
Three Months Ended March 31,
 
2019
 
2018
 
(In thousands)
Income tax provision (benefit) at statutory rate
$
15,290

 
$
12,483

Percentage depletion allowance
(4,307
)
 
(4,607
)
State taxes, net of effect of federal taxes
1,012

 
754

Change in valuation allowance
(12,513
)
 
(10,639
)
Current expense associated with uncertain tax positions
593

 
1,389

Other, net
(5
)
 
76

Provision for (benefit from) income taxes
$
70

 
$
(544
)