Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes

Schedule of income tax provision from continuing operations

(in thousands)	2012		2011			2010
Current
Federal	$	14,856	$	10,047		$	6,349
State		2,885		2,038			1,151
		17,741		12,085			7,500
Deferred
Federal		2,396		(1,039	)		1,421
State		291		(287	)		322
		2,687		(1,326	)		1,743
Income tax expense	$	20,428	$	10,759		$	9,243

Schedule of differences between the U.S. federal statutory tax rate and the Company's effective tax rate for continuing operations

	2012			2011			2010
U.S federal statutory rate		35.0	%		35.0	%		35.0	%
State income taxes, net of U.S. federal income tax expense		3.8			4.5			4.6
Provision to return adjustments, net		(0.2	)		(0.3	)		(1.1	)
Deferred tax adjustments, net		—			(0.1	)		0.2
Domestic production/manufacturing deduction		(2.0	)		(2.7	)		(2.4	)
Refund of fine related to OSHA violation		—			—			(0.1	)
Non-deductible meals and entertainment		0.4			0.7			0.6
Research and development credit		(0.1	)		(0.1	)		(0.3	)
Other, net		0.5			—			(0.1	)
		37.4	%		37.0	%		36.4	%

Schedule of net deferred tax assets and (liabilities)

(in thousands)	2012			2011
Deferred income tax assets:
Self insurance reserves	$	9,439		$	9,772
Contract loss reserves		49			254
Stock-based awards		5,099			5,262
Other		3,253			3,245
Total deferred income tax assets		17,840			18,533
Deferred income tax liabilities:
Property and equipment—tax over book depreciation		(22,572	)		(20,449	)
Intangible assets—tax over book amortization		(4,056	)		(4,185	)
Total deferred income tax liabilities		(26,628	)		(24,634	)
Net deferred income taxes	$	(8,788	)	$	(6,101	)

Schedule of balance sheet classification of deferred income taxes

(in thousands)	2012			2011
Current deferred income tax assets	$	12,742		$	13,253
Non-current deferred income tax liabilities		(21,530	)		(19,354	)
	$	(8,788	)	$	(6,101	)

Schedule of reconciliation of the beginning and ending liabilities for unrecognized tax benefits

(in thousands)	2012			2011
Balance at beginning of period	$	567		$	392
Gross increases in current period tax positions		186			194
Gross increases in prior period tax positions		134			31
Gross decreases in prior period tax positions		(232	)		(34	)
Lapse of applicable statutes of limitations		—			(16	)
Balance at end of period		655			567
Accrued interest and penalties at end of period		185			113
Total liability for unrecognized tax benefits	$	840		$	680