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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Income tax expense is composed of the following: 

			Year Ended December 31,
			2020						2019						2018
Current:
Federal			$	10,825					$	6,426					$	8,844
State			1,291						412						1,317
			12,116						6,838						10,161
Deferred:
Federal			(302)						352						55
State			442						(46)						1,480
			140						306						1,535
Total			$	12,256					$	7,144					$	11,696

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of income tax expense at the normal statutory federal rate to income tax expense included in the accompanying Consolidated Statements of Income is below:

			Year Ended December 31,
			2020						2019						2018
"Expected" provision at federal statutory rate			$	11,046					$	9,654					$	10,286
State income taxes, net			2,408						1,540						2,029
Change in valuation allowance			(422)						(168)						1,304
Share-based compensation			56						(2,877)						(1,201)
Compensation limits			125						148						—
Federal and state tax credits			(1,035)						(1,302)						(807)
Other			78						149						85
Income tax expense			$	12,256					$	7,144					$	11,696
Effective tax rate			23.3		%				15.6		%				23.9		%

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences giving rise to deferred income taxes shown on the Consolidated Balance Sheets are as follows:

			December 31,
			2020						2019
Deferred income tax assets:
Post-retirement liability			$	446					$	717
Deferred income			250						300
Share-based compensation			2,123						1,238
Capital loss carryforwards			—						91
State tax credit carryforwards			2,986						3,198
State operating loss carryforwards			1,264						1,529
Inventories			2,077						1,738
Operating lease liabilities			1,322						1,582
Deferred compensation			1,250						—
Other			1,036						1,291
Gross deferred income tax assets			12,754						11,684
Less: valuation allowance			(862)						(1,284)
Net deferred income tax assets			11,892						10,400
Deferred income tax liabilities:
Fixed assets			(12,205)						(10,332)
Operating lease right-of-use assets			(1,318)						(1,577)
Other			(667)						(420)
Gross deferred income tax liabilities			(14,190)						(12,329)
Net deferred income tax liability			$	(2,298)					$	(1,929)

Summary of Valuation Allowance

A schedule of the change in valuation allowance is as follows:

Balance at December 31, 2018			$	1,452
Decrease			(168)
Balance at December 31, 2019			1,284
Decrease			(422)
Balance at December 31, 2020			$	862

Schedule of Unrecognized Tax Benefits Roll Forward

The following is a reconciliation of the total amount of unrecognized tax benefits (excluding interest and penalties) for 2020, 2019, and 2018:

			Year Ended December 31,
			2020						2019						2018
Beginning of year balance			$	255					$	193					$	185
Additions based on prior year tax positions			2						3						2
Additions based on current year tax positions			20						78						11
Reduction for prior year tax positions			—						(19)						(5)
Reductions for settlements			(165)						—						—
End of year balance			$	112					$	255					$	193

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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