Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current deferred income tax assets:
Accounts receivable	$ 6,598	$ 6,085
State taxes	4,333	2,471
Other liabilities and reserves	14,298	9,716
Other assets	7,042	7,119
Inventory	1,547	1,275
Deferred Tax Assets, Valuation Allowance, Current	(4,911)
Deferred Tax Assets, Net of Valuation Allowance, Current	28,907	22,579
Deferred Tax Assets, Valuation Allowance		(4,087)
Total current deferred income tax assets	28,907	22,579
Non-current deferred income tax (liabilities) assets:
Net operating loss carryforwards	28,111	29,805
Write-down of assets	0	1,222
Start-up costs	0	335
Other assets	27,287	24,955
Intangible assets	(126,451)	(107,112)
Property and equipment	(26,393)	(22,649)
Share-based compensation	6,226	7,377
Valuation allowance	(8,879)	(9,779)
Deferred Tax Liabilities, Gross, Noncurrent	$ (100,099)	$ (75,846)