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Related Party Transactions (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 USD ($) nonemployeedirectors shares | Dec. 31, 2015 USD ($) shares | Dec. 31, 2014 USD ($) | May 17, 2016 shares | May 20, 2014 shares
Related Party Transaction [Line Items] |  |  |  |  |
Number Of Non Employee Directors Electing To Receive Deferred Stock Units | nonemployeedirectors | 6 |  |  |  |
Shares issued | shares | 153,869,075 | 153,658,866 |  | 1,507 | 7,542
Deferred Stock Units Outstanding | 99,035 | 93,044 |  |  |
Executive Vice President and New York regional manager [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Aggregate leasing commissions paid to related parties | $ 315,000 | $ 616,000 | $ 1,214,000 |  |
Brother of Senior Executive Vice President [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Aggregate leasing commissions paid to related parties | $ 374,000 | $ 384,000 | $ 674,000 |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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