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Capital - Distributions (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
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Dec. 29, 2017 | Sep. 29, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 29, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Stockholders' Equity Note Disclosure, Disclosure of Compensation Related Costs, Share-based Payments and Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared and paid on operating partnership units (in dollars per share) | $ 0.105 | $ 0.105 | $ 0.105 | $ 0.105 | $ 0.105 | $ 0.105 | $ 0.105 | $ 0.085 | $ 0.085 | $ 0.085 | $ 0.085 | $ 0.085 |  |  |
Distributions paid to OP unit holders |  |  |  |  |  |  |  |  |  |  |  |  | $ 127.0 | $ 115.0 | $ 91.9

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- Definition Stockholders' Equity Note Disclosure, Disclosure of Compensation Related Costs, Share-based Payments and Earnings Per Share [Abstract] + References No definition available. + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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