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Significant Tenants (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011
Real Estate Properties [Line Items] |  |
Total revenues | $ 63,660 | $ 62,872
Bloomberg [Member] | Customer Concentration Risk [Member] |  |
Real Estate Properties [Line Items] |  |
Total revenues | $ 21,222 | $ 20,893
Percentage Rent Contributed By Tenant | 33.00% | 33.00%

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- Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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