Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Significant Components of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of December 31 are as follows:

	2013		2012
Deferred tax assets:
Employee benefits	$	1,757	$	1,032
Inventories		5,923		7,161
Goodwill		1,358		1,842
Other		4,438		3,761
Total deferred tax assets		13,476		13,796
Deferred tax liabilities:
Depreciation		54,973		45,056
Foreign earnings		1,816		2,665
Total deferred tax liabilities		56,789		47,721
Net deferred tax liabilities	$	43,313	$	33,925

Significant Components of Provision for Income Taxes

Significant components of the provision for income taxes for the years ended December 31 are as follows:

	2013		2012		2011
Current:
Federal	$	27,188	$	37,596	$	57,429
State		2,164		2,268		4,288
Foreign		842		1,581		1,374
Total current		30,194		41,445		63,091
Deferred		10,121		11,212		4,223
	$	40,315	$	52,657	$	67,314

Reconciliation of Income Taxes Computed at U.S. Statutary Tax Rate to Income Tax Expense

The reconciliation of income taxes computed at the U.S. statutory tax rate to the Company’s income tax expense for the years ended December 31 is as follows:

	2013						2012						2011
	Amount			Percent			Amount			Percent			Amount			Percent
U.S. statutory rate	$	43,820			35.0	%	$	55,507			35.0	%	$	69,107			35.0	%
State income taxes, net of federal tax benefit		2,097			1.7			2,199			1.4			3,103			1.6
Mining depletion		(2,751	)		(2.2	)		(2,606	)		(1.6	)		(1,162	)		(0.6	)
Section 199 Manufacturing Benefit and other		(2,851	)		(2.3	)		(2,443	)		(1.6	)		(3,734	)		(1.9	)
	$	40,315			32.2	%	$	52,657			33.2	%	$	67,314			34.1	%