Income taxes (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of provision for income taxes relating to continuing operations

The provision for income taxes relating to continuing operations consists of the following (in thousands):

	December 31,

	2012		2011			2010
Current—
Federal	$	5,679	$	2,207		$	9,474
State and Puerto Rico		1,151		1,673			1,954

		6,830		3,880			11,428

Deferred—
Federal		2,897		(10,121	)		1,501
State and Puerto Rico		318		778			(1,736	)

		3,215		(9,343	)		(235	)

	$	10,045	$	(5,463	)	$	11,193

Schedule of difference in income taxes provided for and the amounts determined by applying the federal statutory tax rate to income before income taxes results

The difference in income taxes provided for and the amounts determined by applying the federal statutory tax rate to income before income taxes results from the following (in thousands):

	December 31,

	2012			2011			2010
Income tax expense (benefit) at the statutory rate	$	7,539		$	(13,278	)	$	11,115
Changes resulting from—
State income taxes, net of federal tax effect		1,011			(1,972	)		924
Increase (decrease) in valuation allowance		455			3,431			(846	)
Increase in contingency reserves		198			28			95
Increase (decrease) from noncontrolling interests		565			(118	)		—
Non-deductible expenses		481			386			452
Production activity deduction		(378	)		—			(391	)
Goodwill impairment		—			9,223			—
Purchase accounting adjustments		(210	)		(2,992	)		—
Other		384			(171	)		(156	)

	$	10,045		$	(5,463	)	$	11,193

Schedule of significant components of the net deferred tax assets and net deferred tax liabilities as reflected on the balance sheet

Significant components of the net deferred tax assets and net deferred tax liabilities as reflected on the balance sheet are as follows (in thousands):

	Year Ended December 31,

	2012			2011
Deferred income tax assets—
Accounts receivable and allowance for doubtful accounts	$	2,293		$	1,692
Goodwill		—			4,519
Stock compensation		2,444			2,583
Accrued liabilities and expenses		19,661			20,809
State net operating loss carryforwards		4,668			4,604
Other		1,224			1,186

Total deferred income tax assets		30,290			35,393

Deferred income tax liabilities—
Property and equipment		(5,357	)		(5,828	)
Long-term contracts		(306	)		(237	)
Goodwill		(1,124	)		—
Intangible assets		(3,932	)		(4,762	)
Tax accounting method change (Section 481 adjustments)		—			(2,978	)
Other		(1,131	)		(671	)

Total deferred income tax liabilities		(11,850	)		(14,476	)

Less—Valuation allowance		(4,453	)		(3,999	)

Net deferred income tax assets	$	13,987		$	16,918

Schedule of deferred income tax assets and liabilities included in the consolidated balance sheets

The deferred income tax assets and liabilities reflected above are included in the consolidated balance sheets as follows (in thousands):

	December 31,

	2012		2011
Deferred income tax assets—
Prepaid expenses and other	$	19,952	$	19,294
Other noncurrent assets		2,324		2,594

Total deferred income tax assets	$	22,276	$	21,888

Deferred income tax liabilities—
Other current liabilities	$	335	$	328
Deferred income tax liabilities		7,954		4,642

Total deferred income tax liabilities	$	8,289	$	4,970

Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

	Year Ended December 31,

	2012			2011		2010
Balance at beginning of year	$	696		$	696	$	634
Additions based on tax positions related to the current year		—			—		189
Additions for tax positions of prior years		—			—		—
Reductions for tax positions of prior years		(197	)		—		(127	)
Settlements		—			—		—

Balance at end of year	$	499		$	696	$	696