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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Schedule of Components of the Provision for Income Taxes

The components of the provision for (benefit from) income taxes are as follows:

		Year Ended December 31,
		2012				2011				2010
		(in thousands)
Current:
Federal		$	5,428			$	2,639			$	(11,047	)
State			130				695				45
Total current tax expense			5,558				3,334				(11,002	)
Deferred:
Federal			(296	)			5,380				9,743
State			259				904				(389	)
Total deferred tax expense			(37	)			6,284				9,354
		$	5,521			$	9,618			$	(1,648	)

Schedule of Effective Income Tax Rate Reconciliation

The difference between the Company’s effective income tax rates and the statutory United States federal income tax rate of 35% is explained as follows:

		Year Ended December 31,
		2012				2011				2010
		(in thousands)
Provision (benefit) at statutory rate of 35%		$	7,618			$	7,800			$	(2,481	)
State provision, net of federal benefit			519				922				174
Research and development credits			(1,801	)			—				—
Domestic manufacturing deduction			(762	)			(389	)			772
Sale of business			—				341				—
Change in valuation allowance			—				872				—
Other			(53	)			72				(113	)
		$	5,521			$	9,618			$	(1,648	)
Effective tax (benefit) rate			25.4	%			43.2	%			(23.2	)%

Schedule of Current and Non-Current Deferred Tax Assets and Liabilities

The tax effect of temporary differences that give rise to significant portions of deferred tax assets and liabilities is presented below:

		December 31,
		2012				2011
		(in thousands)
Current deferred tax assets:
Costs and estimated earnings in excess of billings on uncompleted contracts, net		$	1,323			$	1,459
Accrued employee benefits			1,612				3,110
Inventories			1,393				1,337
Trade receivable, net			650				625
Net operating loss carryforwards			364				622
Accrued professional fees			—				77
Other			693				176
			6,035				7,406
Valuation allowance			(146	)			(350	)
			5,889				7,056
Current deferred tax liabilities:
Prepaid expenses			(712	)			(665	)
Current deferred tax assets, net			5,177				6,391
Noncurrent deferred tax assets:
Net operating loss carryforwards			549				499
Tax credit carryforwards			64				102
Accrued employee benefits			3,673				2,708
Other assets			4,527				3,617
Other			17				219
			8,830				7,145
Valuation allowance			(794	)			(576	)
			8,036				6,569
Noncurrent deferred tax liabilities:
Property and equipment			(23,290	)			(27,157	)
Noncurrent deferred tax liabilities, net			(15,254	)			(20,588	)
Net deferred tax liabilities		$	(10,077	)		$	(14,197	)

Schedule of Unrecognized Tax Benefits

A summary of the changes in the unrecognized tax benefits during the years ended December 31, 2012, 2011 and 2010 is presented below (in thousands):

		2012				2011				2010
Unrecognized tax benefits, beginning of year		$	309			$	125			$	185
Decreases for settlements			—				—				(60	)
Increases for positions taken in prior years			3,571				10				—
Decreases for positions taken in prior years			(184	)			—				—
Increases for positions taken in the current year			1,549				174				—
Unrecognized tax benefits, end of year		$	5,245			$	309			$	125

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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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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Tabular disclosure of the change in unrecognized tax benefits.

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