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Investments (Details) (USD $) | 12 Months Ended | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Mar. 31, 2011 Keymark Enterprises, LLC | Dec. 31, 2011 Keymark Enterprises, LLC | Mar. 31, 2011 Keymark Enterprises, LLC Other Investor
Equity Method Investment |  |  |  |  |
Equity method investment ownership percentage |  |  |  | 40.60% |
Discharge of debt owed by other owner of equity method investee |  |  |  |  |
Balance due on defaulted debt |  |  |  |  | $ 700,000
Increase (decrease) in equity method investment (as a percent) |  |  | 5.50% |  |
Ownership percentage after discharge of debt of other owner |  |  | 46.10% |  |
Purchase of Keymark software assets |  |  |  |  |
Software assets acquired |  |  |  | 11,500,000 |
Software assets acquired, net cash payments |  |  |  | 6,200,000 |
Ownership interest given up in exchange for software assets acquired (as a percent) |  |  |  | 46.05% |
Gain on disposal of investment in Keymark |  |  |  | 4,300,000 |
Investment in Keymark, carrying value |  |  |  | 1,000,000 |
Loan repayment received from Keymark | $ 552,000 | $ 50,000 |  | $ 500,000 |

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