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Investments in and Advances to Joint Ventures - Service Fees and Income Earned by Company's Unconsolidated Joint Ventures (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Equity Method Investments And Joint Ventures [Abstract] |  |  |
Management and other fees | $ 24.2 | $ 28.6 | $ 26.0
Interest income | 25.9 | 33.4 | 26.0
Development fees and leasing commissions | $ 9.1 | $ 7.5 | $ 6.8

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- Definition Service fees and income earned for development and leasing in accordance with management contracts related to equity method investments. + References No definition available. + Details
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- Definition This element represents interest earned on the notes receivable from unconsolidated joint ventures accounted for under the equity method. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations. + References Reference 1: 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(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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