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Summary of Significant Accounting Policies Narrative (Details) | Jun. 30, 2015
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Minimum |
Accounting Policies [Line Items] |
Percent of observatory revenue in quarter one over a ten year period | 16.00%
Percent of observatory revenue in quarter two over a ten year period | 26.00%
Percent of observatory revenue in quarter three over a ten year period | 31.00%
Percent of observatory revenue in quarter four over a ten year period | 23.00%
Maximum |
Accounting Policies [Line Items] |
Percent of observatory revenue in quarter one over a ten year period | 18.00%
Percent of observatory revenue in quarter two over a ten year period | 28.00%
Percent of observatory revenue in quarter three over a ten year period | 33.00%
Percent of observatory revenue in quarter four over a ten year period | 25.00%

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- Definition Historical Revenue Trend, Observatory Revenue, in Quarter Four Over Ten Year Period, Percent + References No definition available. + Details
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- Definition Historical Revenue Trend, Observatory Revenue, in Quarter Three Over Ten Year Period, Percent + References No definition available. + Details
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