Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Summarized details of income (loss) before income taxes by region

	Year Ended December 31,
	2013		2012		2011
United States	$	8,818	$	10,723	$	(100,179	)
Foreign	950		533		115
Total income (loss) before income taxes	$	9,768	$	11,256	$	(100,064	)

Components of income tax expense

	Year Ended December 31,
	2013			2012			2011
Current income tax expense:
Federal	$	10,484		$	941		$	300
State	2,718			3,235			1,524
Foreign	922			113			100
Total current income tax expense	14,124			4,289			1,924
Deferred income tax expense (benefit):
Federal	(8,060		)	6,551			(33,860		)
State	(905		)	(1,588		)	2,893
Foreign	(2,376		)	(438		)	—
Total deferred income tax expense (benefit)	(11,341		)	4,525			(30,967		)
Total income tax expense (benefit)	$	2,783		$	8,814		$	(29,043	)

Effective income tax rate continuing operations tax rate reconciliation

	Year Ended December 31,
	2013			2012			2011
Provision at statutory rate	$	3,419		$	3,940		$	(35,022	)
Foreign provision in excess of federal statutory rate	205			37			32
State income tax (benefit) expense, net of federal benefit	(222		)	2,189			(1,821		)
Stock based compensation	887			1,561			2,131
Meals & entertainment	343			655			649
Permanent differences	27			54			483
Impairment charges	—			2,905			—
Research and development credits	(1,668		)	—			(1,028		)
Other	188			(374		)	973
Change in valuation allowance	(396		)	(2,153		)	4,560
Total income tax expense (benefit)	$	2,783		$	8,814		$	(29,043	)

Significant components of Company's deferred tax assets and liabilities

	December 31,
	2013			2012
Deferred Tax Assets:
Net operating loss carry-forwards	$	6,785		$	7,018
Stock based compensation	37,192			31,804
Original issue discount	—			270
General business credit carry-forwards	3,215			4,692
Litigation and related accrual	49,779			44,796
Other	12,290			11,178
Gross deferred tax assets	109,261			99,758
Valuation allowance	(8,989		)	(8,275		)
Net deferred tax assets	$	100,272		$	91,483
Deferred Tax Liabilities:
Capitalized assets	$	(4,277	)	$	(5,507	)
Original issue discount	(2,276		)	(2,767		)
Acquired intangibles	(16,714		)	(17,476		)
Other	—			(51		)
Deferred tax liabilities	(23,267		)	(25,801		)
Consolidated net deferred tax assets	77,005			65,682
Add: Deferred tax liability, net, attributable to noncontrolling interests	1,681			1,753
Net deferred tax assets	$	78,686		$	67,435

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	Year Ended December 31,
	2013		2012		2011
Unrecognized tax benefit at the beginning of the year	$	4,399	$	4,279	$	3,930
Additions from tax positions taken in the current year	13		100		178
Additions from tax positions taken in prior years	92		20		171
Reductions from tax positions taken in prior years	—		—		—
Settlements of tax audits	—		—		—
Unrecognized tax benefit at the end of the year	$	4,504	$	4,399	$	4,279