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Income Taxes (Details Textual) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Change From Non Taxable Acquisition |  |  | $ 3,188
Deferred Tax Liability Accrued And Other Liabilities | 49 | 51 |
Deferred Tax Assets Other Current Assets | 305 | 387 |
Indefinite Loss Carryforwards | 168,574 |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount | 16,240 | 44,230 | 7,986
Non-deductible stock-based compensation | 7,698 | 7,144 | 4,941
Additional tax reserve | 0 | 0 | 4,100
Income Taxes Receivable | 195 | 313 |
Accrued Income Taxes | 4,725 | 5,381 |
Income Tax Examination, Penalties and Interest Expense, Total |  |  | 1,093
Deferred Tax Assets, Operating Loss Carryforwards, Domestic | 67,308 |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 39,899 |  |
Unrecognized Tax Benefit | 4,166 | 4,717 |
Operating Loss Carryforward Expiration Date | years 2015 through 2031 |  |
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | 170,329 |  |
United States [Member] |  |  |
Indefinite Loss Carryforwards | 56,265 |  |
Canadian [Member] |  |  |
Indefinite Loss Carryforwards | $ 112,309 |  |

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