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Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 6 Months Ended |  |  | 6 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 30, 2008 | Jun. 30, 2012 HRE Trust Fund | Jul. 08, 2011 HRE Trust Fund | Mar. 02, 2011 HRE Trust Fund member | Jun. 30, 2012 HRE Trust Fund Arlington Park Purses | Jun. 30, 2012 HRE Trust Fund Arlington Park Improvements, Marketing and Maintainance
Gain Contingencies [Line Items] |  |  |  |  |  |
Period Of Time Public Act 94-804 Was Extended | 3 years |  |  |  |  |
Surcharge Of Revenues Of Illinois Riverboat Casinos | 3.00% |  |  |  |  |
Number Of Members Of The Seventh Circuit Court |  |  |  | 3 |  |
Length Of Stay Related To Dissolutation Of A Temporary Restraining Order |  |  | 30 days |  |  |
Cash Received From Legal Proceedings |  | $ 45.4 |  |  | $ 26.1 | $ 19.3

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