00100 - Statement - CONSOLIDATED BALANCE SHEETS
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00200 - Statement - CONSOLIDATED STATEMENTS OF INCOME
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00300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY
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00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS
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40604 - Disclosure - Investments in Partially Owned Entities (Details)
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40504 - Disclosure - Derivative Instrument and Marketable Securities: Marketable Securities (Details)
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40704 - Disclosure - Mezzanine Loans Receivable (Details)
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40904 - Disclosure - Identified Intangible Assets and Intangible Liabilities (Details)
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41004 - Disclosure - Debt (Details)
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41104 - Disclosure - Redeemable Noncontrolling Interests (Details)
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41304 - Document - Fair Value Measurements (Details)
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40804 - Disclosure - Discontinued Operations (Details)
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41504 - Disclosure - Fee and Other Income (Details)
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41404 - Disclosure - Stock-based Compensation (Details)
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41604 - Disclosure - Interest and Other Investment Income (Loss), Net (Details)
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41704 - Disclosure - Income Per Share (Details)
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41804 - Disclosure - Comprehensive Income (Loss) (Details)
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41904 - Disclosure - Retirement Plan (Details)
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42104 - Disclosure - Commitments and Contingencies (Details)
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00001 - Document - Document and Entity Information
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00110 - Statement - CONSOLIDATED BALANCE SHEETS (Parentheticals)
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00210 - Statement - CONSOLIDATED STATEMENTS OF INCOME (Parentheticals)
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00410 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals)
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10101 - Disclosure - Organization and Business
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10201 - Disclosure - Basis of Presentation and Significant Accounting Policies
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10301 - Disclosure - Recently Issued Accounting Literature
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10601 - Disclosure - Investments in Partially Owned Entities
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10501 - Disclosure - Marketable Securities and Derivative Instruments
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10701 - Disclosure - Mezzanine Loans Receivable
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10901 - Disclosure - Identified Intangible Assets and Liabilities
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11001 - Disclosure - Debt
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11101 - Disclosure - Redeemable Noncontrolling Interests
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11301 - Disclosure - Fair Value Measurements
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10801 - Disclosure - Discontinued Operations
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11501 - Disclosure - Fee and Other Income
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11401 - Disclosure - Stock-based Compensation
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11601 - Disclosure - Interest and Other Investment Income (Loss), Net
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11701 - Disclosure - Income Per Share
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11801 - Disclosure - Comprehensive Income (Loss)
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11901 - Disclosure - Retirement Plan
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12001 - Disclosure - Subsequent Event
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12101 - Disclosure - Commitments and Contingencies
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12201 - Disclosure - Segment Information
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20202 - Disclosure - Basis of Presentation and Significant Accounting Policies (Policy)
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30603 - Disclosure - Investments in Partially Owned Entities (Tables)
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30503 - Disclosure - Derivative Instruments and Marketable Securities (Tables)
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30703 - Disclosure - Mezzanine Loans Receivable (Tables)
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30903 - Disclosure - Identified Intangible Assets and Intangible Liabilities (Tables)
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31003 - Disclosure - Debt (Tables)
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31103 - Disclosure - Redeemable Noncontrolling Interests (Tables)
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31303 - Disclosure - Fair Value Measurements (Tables)
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30803 - Disclosure - Discontinued Operations (Tables)
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31503 - Disclosure - Fee and Other Income (Tables)
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31603 - Disclosure - Interest and Other Investment Income (Loss), Net (Tables)
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31703 - Disclosure - Income Per Share (Tables)
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31803 - Disclosure - Comprehensive Income (Loss) (Tables)
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32203 - Disclosure - Segment Information (Tables)
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40104 - Disclosure - Organization and Business (Details)
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40614 - Disclosure - Investments in Partially Owned Entities (Parentheticals) (Details)
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40714 - Disclosure - Mezzanine Loans Receivable (Parentheticals) (Details)
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41014 - Disclosure - Debt (Parentheticals) (Details)
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41714 - Disclosure - Income Per Share (Parentheticals) (Details)
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42004 - Disclosure - Subsequent Event (Details)
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42204 - Disclosure - Segment Information (Details)
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42214 - Disclosure - Segment Information (Parentheticals) (Details)
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40404 - Disclosure - Acquisitions (Details)
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40609 - Disclosure - Investments in Partially Owned Entities - Debt (Details)
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41019 - Disclosure - Debt (Convertible and Exchangeable) (Details)
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41204 - Disclosure - Shareholders Equity (Details)
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11201 - Disclosure - Shareholders Equity
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40503 - Disclosure - Derivative Instruments and Marketable Securities: Derivative Instrument (Details)
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80004 - Disclosure - SEC Schedule II Valuation and Qualifying Accounts (Details)
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90004 - Disclosure - SEC Schedule III Real Estate (Details)
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90014 - Disclosure - SEC Schedule III Rollforward of Real Estate Assets and Accumulated Depreciation (Details)
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11851 - Disclosure - Leases
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12131 - Disclosure - Related Party Transactions
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12161 - Disclosure - Summary of Quarterly Results
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30203 - Disclosure - Basis of Presentation and Significant Accounting Policies (Tables)
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31203 - Disclosure - Shareholder's Equity (Tables)
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31403 - Disclosure - Stock-based Compensation (Tables)
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31853 - Disclosure - Leases (Tables)
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32163 - Disclosure - Summary of Quarterly Results (Tables)
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40204 - Disclosure - Basis of Presentation and Significant Accounting Policies (Details)
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41834 - Disclosure - Leases (Details)
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42134 - Disclosure - Related Party Transactions (Details)
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42164 - Disclosure - Summary of Quarterly Results (Details)
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41509 - Disclosure - Fee and Other Income (Parentheticals) (Details)
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32503 - Disclosure - SEC Schedule III Real Estate and Accumulated Depreciation (Tables)
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32403 - Disclosure - SEC Schedule II Valuation and Qualifying Accounts (Tables)
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14001 - Disclosure - SEC Schedule II Valuation and Qualifying Accounts
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14501 - Disclosure - SEC Schedule III Real Estate and Accumulated Depreciation
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10401 - Disclosure - Acquisitions
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