Income Taxes Schedule of the tax effects of temporary differences that give rise to the Company’s deferred tax accounts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Accrued compensation	$ 9,264	$ 11,126
Reserves and accruals	2,027	4,635
Bad debts	0	1,145
Loss and credit carryforwards	12,817	10,912
Total gross deferred tax assets	24,108	27,818
Less: valuation allowances	(6,362)	(5,354)
Net total deferred tax assets	17,746	22,464
Deferred tax liabilities:
Property and equipment depreciation	(3,560)	(4,098)
Intangible asset amortization	(4,815)	(2,135)
Other	(335)	(1,016)
Total deferred tax liabilities	(8,710)	(7,249)
Net deferred tax assets	$ 9,036	$ 15,215