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Goodwill and Intangible Assets (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2005
Goodwill and Intangible Assets |  |  |  |
Goodwill | $ 40,969,000 | $ 40,969,000 | $ 40,969,000 |
Estimated amortization of the contractual agreements |  |  |  |
Weighting of both income and market approaches for determining the fair value of goodwill (as a percent) |  | 50.00% | 50.00% |
Discount rate used to estimate fair value of goodwill (as a percent) |  | 14.60% | 13.40% |
CALLC |  |  |  |
Other Intangible Assets |  |  |  |
Fair market value of contractual agreements acquired in connection with the acquisition |  |  |  | 1,300,000
Accumulated amortization related to contractual agreements | 1,000,000 |  |  |
Amortization expense related to contractual agreements | 33,000 | 33,000 | 33,000 |
Estimated amortization of the contractual agreements |  |  |  |
2012 | 28,000 |  |  |
2013 | 27,000 |  |  |
2014 | 27,000 |  |  |
2015 | 27,000 |  |  |
2016 | 27,000 |  |  |
Thereafter | 175,000 |  |  |
Total | $ 311,000 |  |  |

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