Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Taxes

Schedule of income tax expense

	2014		2013		2012
Current income tax expense	$	5,282	$	3,240	$	3,547
Deferred income tax expense		1,273		1,793		2,131
Income tax expense	$	6,555	$	5,033	$	5,678

Schedule of reconciliation of income taxes computed at the federal statutory rate to income tax expense

	2014						2013						2012
	Amount			Percent of Pretax Income			Amount			Percent of Pretax Income			Amount			Percent of Pretax Income
Income taxes computed at the federal statutory rate	$	9,073			35.0	%	$	6,942			35.0	%	$	7,735			35.0	%
(Reduction) increase in taxes resulting from:
Statutory depletion in excess of cost depletion		(2,139	)		(8.2	)		(1,965	)		(9.9	)		(2,048	)		(9.3	)
Manufacturing deduction		(574	)		(2.2	)		(299	)		(1.5	)		(335	)		(1.5	)
State income taxes, net of federal income tax benefit		104			0.4			132			0.7			331			1.5
Other		91			0.3			223			1.1			(5	)		(0.0	)
Income tax expense	$	6,555			25.3	%	$	5,033			25.4	%	$	5,678			25.7	%

Summary of the Company's deferred tax liabilities and assets

	December 31, 2014		December 31, 2013
Deferred tax liabilities
Lime and limestone property, plant and equipment	$	20,089	$	20,614
Natural gas interests drilling costs and equipment		3,387		3,680
Other		292		344
		23,768		24,638
Deferred tax assets
Alternative minimum tax credit carry forwards		3,887		5,866
Minimum pension liability		346		299
Fair value liability of interest rate hedges		240		557
Other		470		635
		4,943		7,357
Net deferred tax liabilities	$	18,825	$	17,281

        Current income taxes are classified on the Company's Consolidated Balance Sheets as follows:

Prepaid expenses and other current assets $ 881  $ 203 

        Deferred income taxes are classified on the Company's Consolidated Balance Sheets as follows:

Prepaid expenses and other current assets	$	434	$	518
Deferred tax liabilities, net	$	19,259	$	17,799