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Summary Of Significant Accounting Policies and Recent Accounting Pronouncements (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Accounting Policies [Abstract] |  |  |  |
Average amortization period for acquired leases | 7 months | 6 months | 7 months | 6 months
Capitalized interest | $ 5.4 | $ 3.4 | $ 10.3 | $ 6.7
Capitalized real estate taxes | $ 1.4 | $ 0.7 | $ 3.0 | $ 1.6

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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