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Significant Accounting Policies (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Consolidated Largest Client Revenue | 10.00% |  | 10.00% |  |
Consolidated Accounts Receivable Percentage | 10.00% |  | 10.00% |  |
Restricted Cash and Cash Equivalents, Noncurrent | $ 47 |  | $ 47 |  | $ 46
Business Acquisition, Increase (Decrease) in Contingent Purchase Price Obligation | 13,631 | 1,844 | 20,126 | 866 |
Business Combination, Acquisition Related Costs | 811 | 797 | 2,481 | 2,438 |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 205,694 |  | 205,694 |  |
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities | 175,772 |  | 175,772 |  |
Amortization of Debt Discount (Premium) |  |  | 12 |  | 232
Investment Income, Amortization of Premium |  |  | 978 |  | 943
Deferred Finance Costs, Net | 10,254 |  | 10,254 |  | 11,715
Accumulated Amortization, Deferred Finance Costs | 5,178 |  | 5,178 |  | 3,526
Deferred Financing Costs |  |  | 191 |  |
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares) |  |  | 918,727 |  |
Aggregate Grant Date Fair Value |  |  | $ 11,603 |  |
Interest Rate Percentage on Senoir Notes | 11.00% |  | 11.00% |  |
Doner Partners LLC [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage | 30.00% |  | 30.00% |  |
Percentage of Ownership, Convertible Preferred Interests to Increase Ordinary Voting | 70.00% |  | 70.00% |  |
Common Class A [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) | 731,016 |  | 731,016 |  |

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