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Summary of Significant Accounting Policies: (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenues |  |  |
Increase in minimum rent due to straight-line rent adjustment | $ 6,073 | $ 4,743 | $ 4,079
Minimum |  |  |
Revenues |  |  |
Management fees as a percentage of gross monthly rental revenue | 1.50% |  |
Maximum |  |  |
Revenues |  |  |
Management fees as a percentage of gross monthly rental revenue | 5.00% |  |

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- Definition Represents the revenue earned for operating and managing third-party properties, expressed as a percentage of the gross monthly rental revenue of the properties managed. + References No definition available. + Details
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- Definition Difference between actual rental income due and rental income recognized on a straight-line basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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