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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Deferred tax liabilities: |  |
Property and equipment | $ 9,205 | $ 9,766
Intangible assets | 10,437 | 5,538
Prepaid expenses | 616 | 439
Total deferred tax liabilities | 20,258 | 15,743
Deferred tax assets: |  |
Allowance for doubtful accounts | 233 | 319
Compensation | 3,195 | 3,060
Other accrued liabilities | 76 | 150
Loss carry forwards | 58 | 92
Deferred Tax Assets, Gross | 3,562 | 3,621
Less: valuation allowance | 58 | 92
Total net deferred tax assets | 3,504 | 3,529
Net deferred tax liabilities | 16,754 | 12,214
Current portion of deferred tax assets | 892 | 1,169
Non-current portion of deferred tax liabilities | 17,646 | 13,383
Net deferred tax liabilities | $ (16,754) | $ (12,214)

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