Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax liabilities:
Property and equipment	$ 8,235	$ 9,205
Intangible assets	14,425	10,437
Prepaid expenses	601	616
Total deferred tax liabilities	23,261	20,258
Deferred tax assets:
Allowance for doubtful accounts	232	233
Compensation	3,355	3,195
Other accrued liabilities	128	76
Loss carry forwards	7	58
Deferred Tax Assets, Gross, Total	3,722	3,562
Less: valuation allowance	7	58
Total net deferred tax assets	3,715	3,504
Net deferred tax liabilities	19,546	16,754
Current portion of deferred tax assets	1,025	892
Non-current portion of deferred tax liabilities	(20,571)	(17,646)
Net deferred tax liabilities	$ (19,546)	$ (16,754)