Quarterly report pursuant to Section 13 or 15(d)

INCOME TAXES

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INCOME TAXES
9 Months Ended
Sep. 30, 2016
INCOME TAXES [Abstract]  
INCOME TAXES
14. INCOME TAXES

We file an income tax return in the U.S. federal jurisdiction and a margin tax return in Texas. Tax returns for the years 2011 through 2015 remain open for examination in various tax jurisdictions in which we operate.  As of September 30, 2016, and December 31, 2015, we recognized no material adjustments in connection with uncertain tax positions.  The effective tax rate varies from the federal statutory rate of 35% primarily as a result of state tax expense and stock based compensation offset by the manufacturing deduction. The income tax expense in the current quarter includes adjustments to previous estimates of permanent differences indicated above.  During 2015 we made estimated tax payments based on the tax law in effect prior to the reinstatement of bonus depreciation in December 2015.  On October 4, 2016, we received a refund of approximately $1.9 million in connection with these overpayments.