Entity Central Index Key Land buildings and improvements intangible lease assets and other. Net Investment In Real Estate Assets Interest and rent receivable. Straight-line rent receivable Other loans Lease deposits and other obligations to tenants Payable due to parent company Rent billed Straight line rent revenue net of write offs. Business combination acquisition related costs accrual adjustment. Debt refinancing charge. Recognition Of Unearned Income On Direct Financing And Sales Type Leases Increase decrease in interest and rent receivable. Construction in progress, equipment, and other Payments for proceeds from lease deposits and other obligations to tenants. Document And Entity Information [Abstract] Document Information [Table] Document Information [Table] Legal Entity Legal Entity [Axis] Entity Entity [Domain] MPT Operating Partnership L.P MPT Operating Partnership, L.P. [Member] Mpt Operating Partnership L P [Member] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Real Estate Assets [Abstract] Gross investment in real estate assets Accumulated depreciation and amortization. Statement Of Financial Position [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Units [Member] Common Stock [Member] Partner Type Partner Type Of Partners Capital Account [Axis] Partner Type of Partners' Capital Account, Name Partner Type Of Partners Capital Account Name [Domain] General Partner [Member] General Partner [Member] LTIP Units. LTIP Units [Member] Ltip Units [Member] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Real estate assets Real Estate Assets [Abstract] Land, buildings and improvements, intangible lease assets, and other Land Buildings And Improvements Intangible Lease Assets And Other Real estate held for sale Real Estate Heldforsale Mortgage loans Mortgage Loans On Real Estate Commercial And Consumer Net Net investment in direct financing leases Net Investment In Direct Financing And Sales Type Leases Gross investment in real estate assets Gross Investment In Real Estate Assets Accumulated depreciation and amortization Accumulated Depreciation And Amortization Net investment in real estate assets Net Investment In Real Estate Assets Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Interest and rent receivables Interest And Rent Receivable Straight-line rent receivables Straight Line Rent Receivable Other loans Other Loans Other assets Other Assets Total Assets Assets Liabilities and Equity Liabilities And Stockholders Equity [Abstract] Liabilities Liabilities [Abstract] Debt, net Long Term Debt Accounts payable and accrued expenses Accounts Payable And Accrued Liabilities Current And Noncurrent Deferred revenue Deferred Revenue Lease deposits and other obligations to tenants Lease Deposits And Other Obligations To Tenants Payable due to Medical Properties Trust, Inc. Payable Due To Parent Company Total liabilities Liabilities Equity / Capital Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Preferred stock, $0.001 par value. Authorized 10,000 shares; no shares outstanding Preferred Stock Value Common stock, $0.001 par value. Authorized 500,000 shares; issued and outstanding — 364,695 shares at March 31, 2018 and 364,424 shares at December 31, 2017 Common Stock Value Limited Partners: Limited Partners Capital Account [Abstract] Additional paid-in capital Additional Paid In Capital Common Stock Distributions in excess of net income Retained Earnings Accumulated Deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Treasury shares, at cost Treasury Stock Value Total Medical Properties Trust, Inc. Stockholders' Equity (MPT Operating Partnership, L.P. capital) Stockholders Equity Non-controlling interests Minority Interest Total Equity / Capital Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total Liabilities and Equity / Capital Liabilities And Stockholders Equity Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Revenues Revenues [Abstract] Rent billed Rent Billed Straight-line rent Straight Line Rent Revenue Net Of Write Offs Income from direct financing leases Capital Leases Income Statement Direct Financing Lease Revenue Interest and fee income Interest And Fee Income Loans Commercial Real Estate Total revenues Revenues Expenses Costs And Expenses [Abstract] Interest Interest Expense Real estate depreciation and amortization Depreciation And Amortization Property-related Direct Costs Of Leased And Rented Property Or Equipment General and administrative General And Administrative Expense Acquisition costs Business Combination Acquisition Related Costs Accrual Adjustment Total expenses Costs And Expenses Other income (expense) Nonoperating Income Expense [Abstract] Gain on sale of real estate, net Gains Losses On Sales Of Investment Real Estate Debt refinancing costs Debt Refinancing Charge Other Other Nonoperating Income Expense Total other income (expense) Nonoperating Income Expense Income before income tax Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit Net income Profit Loss Net income attributable to non-controlling interests Net Income Loss Attributable To Noncontrolling Interest Net income attributable to MPT common stockholders (Operating Partnership partners) Net Income Loss Earnings per common share — basic and diluted Earnings Per Share Basic And Diluted [Abstract] Net income attributable to MPT common stockholders (Operating Partnership partners) Earnings Per Share Basic And Diluted Weighted average shares outstanding - basic Weighted Average Number Of Shares Outstanding Basic Weighted average shares outstanding - diluted Weighted Average Number Of Diluted Shares Outstanding Dividends declared per common share Common Stock Dividends Per Share Declared Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Foreign currency translation gain Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax Total comprehensive income Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Comprehensive income attributable to non-controlling interests Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive income attributable to MPT common stockholders (Operating Partnership Partners) Comprehensive Income Net Of Tax Supplemental Schedule Of Non Cash Financing Activities [Abstract] Statement Of Cash Flows [Abstract] Operating activities Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation Depletion And Amortization Amortization of deferred financing costs and debt discount Amortization Of Financing Costs And Discounts Direct financing lease interest accretion Recognition Of Unearned Income On Direct Financing And Sales Type Leases Straight-line rent revenue Straight Line Rent Share / (Unit)-based compensation expense Share Based Compensation Gain from sale of real estate, net Straight-line rent and other write-off Impairment Of Real Estate Debt refinancing costs Other adjustments Other Noncash Income Expense Changes in: Increase Decrease In Operating Capital [Abstract] Interest and rent receivables Increase Decrease In Interest And Rent Receivable Accounts payable and accrued expenses Increase Decrease In Accounts Payable And Accrued Liabilities Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Investing activities Net Cash Provided By Used In Investing Activities [Abstract] Cash paid for acquisitions and other related investments Payments To Acquire Real Estate Net proceeds from sale of real estate Proceeds From Sale Of Productive Assets Principal received on loans receivable Proceeds From Collection Of Loans Receivable Investment in loans receivable Payments For Proceeds From Loans Receivable Construction in progress and other Construction In Progress Equipment And Other Net cash (used for) provided by investing activities Net Cash Provided By Used In Investing Activities Financing activities Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from term debt Proceeds From Issuance Of Long Term Debt Payments of term debt Repayments Of Long Term Debt Revolving credit facilities, net Proceeds From Repayments Of Lines Of Credit Distributions paid Payments Of Ordinary Dividends Lease deposits and other obligations to tenants Payments For Proceeds From Lease Deposits And Other Obligations To Tenants Debt issuance costs paid and other financing activities Proceeds From Payments For Other Financing Activities Net cash (used for) provided by financing activities Net Cash Provided By Used In Financing Activities (Decrease) increase in cash, cash equivalents and restricted cash for period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect Effect of exchange rate changes Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash, cash equivalents and restricted cash at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Interest paid Interest Paid Supplemental schedule of non-cash financing activities: Supplemental Schedule Of Non Cash Financing Activities [Abstract] Distributions declared, unpaid Dividends Payable Current And Noncurrent Cash, cash equivalents and restricted cash are comprised of the following: Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract] Cash and cash equivalents at beginning of period Restricted cash, included in Other assets at beginning of period Restricted Cash And Cash Equivalents Cash and cash equivalents at end of period Restricted cash, included in Other assets at end of period General Partner — issued and outstanding — 3,647 units at March 31, 2018 and 3,644 units at December 31, 2017 General Partners Capital Account Limited Partners Capital Limited Partners Capital Account General partner, units issued General Partners Capital Account Units Issued General partner, units outstanding General Partners Capital Account Units Outstanding Limited Partners, units issued Common Unit Issued Limited Partners, units outstanding Common Unit Outstanding LTIP Units, shares issued Limited Partners Capital Account Units Issued LTIP Units, shares outstanding Limited Partners Capital Account Units Outstanding Accounting Policies [Abstract] Organization Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Real Estate And Loans Receivables. Text Block [Abstract] Real Estate and Lending Activities Real Estate And Loans Receivables [Text Block] Debt Disclosure [Abstract] Debt Long Term Debt [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Unaudited Interim Condensed Consolidated Financial Statements Consolidation Policy [Text Block] Recent Accounting Developments New Accounting Pronouncements Policy Policy [Text Block] Reclassifications and Revisions Prior Period Reclassification Adjustment Description Variable Interest Entities Consolidation Variable Interest Entity Policy Carrying Value and Classification of Related Assets and Maximum Exposure to Loss Schedule Of Variable Interest Entities [Text Block] Assets Acquired Schedule Of Business Acquisitions By Acquisition [Text Block] Schedule Of Development Projects [Table Text Block] Summary of Status Update on Current Development Projects Schedule Of Development Projects Table [Text Block] Investments in Direct Financing Leases Vs Equipment. Components of Net Investment in Direct Financing Leases Components Of Investment In Leases Of Equipment Table [Text Block] Schedule of Loans Receivable. Summary of Loans Schedule Of Loans Receivable Table [Text Block] Revenue by operator. Schedule of Revenue by Operator Revenue By Operator Table [Text Block] Schedule of Revenue from External Customers by Geographic Areas Revenue From External Customers By Geographic Areas Table [Text Block] Long lived assets by operators. Schedule of Gross Assets by Operator Long Lived Assets By Operators Table [Text Block] Schedule of Gross Assets by Geographic Areas Long Lived Assets By Geographic Areas Table [Text Block] Summary of Debt Schedule Of Debt Table [Text Block] Principal Payments Due on Debt Contractual Obligation Fiscal Year Maturity Schedule Table [Text Block] Summary of Fair Value Information of Financial Instruments Fair Value By Balance Sheet Grouping [Text Block] Equity Interest in Related Party and Related Loans Measured at Fair Value on Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Fair value assumptions and methodology for assets and liabilities. Summary Showing Sensitivity Analysis by Using Basis Point Variations Fair Value Assumptions And Methodology For Assets And Liabilities Table [Text Block] Calculation of Earnings Per Share Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] Accounting standards update 201701. Accounting Standards Update No. 2017-01 [Member] Accounting Standards Update201701 [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] General and Administrative Expenses [Member] General And Administrative Expense [Member] Accounting Standards Update 2014-09 [Member] Accounting Standards Update201409 [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Increase in general and administrative expenses New Accounting Pronouncement Or Change In Accounting Principle Effect Of Change On Operating Results Adjustment to retained earnings Cumulative Effect On Retained Earnings Net Of Tax1 Schedule Of Variable Interest Entities [Table] Schedule Of Variable Interest Entities [Table] Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Equity investments [Member] Equity Method Investments [Member] Securities or Other Assets Sold under Agreements to Repurchase Assets Sold Under Agreements To Repurchase [Axis] Assets Sold under Agreements to Repurchase, Type Assets Sold Under Agreements To Repurchase Type [Domain] Loans, net [Member] Loans [Member] Variable Interest Entities Variable Interest Entities By Classification Of Entity [Axis] Variable Interest Entity, Classification Classification Of Variable Interest Entity [Domain] Mortgage And Other Loans Mortgage and other loans [Member] Mortgage And Other Loans [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Maximum Loss Exposure Variable Interest Entity Entity Maximum Loss Exposure Amount Carrying Amount Variable Interest Entity Consolidated Carrying Amount Assets Business Combinations [Abstract] Schedule Of Business Acquisitions By Acquisition [Table] Schedule Of Business Acquisitions By Acquisition [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Land [Member] Land [Member] Building [Member] Building [Member] Intangible Lease Assets Intangible Lease Assets - Subject to Amortization [Member] Intangible Lease Assets [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Total assets acquired Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] Germany [Member] GERMANY Major Property Class Major Property Class [Axis] Major Property Class Major Property Class [Domain] Rehabilitation hospital. Rehabilitation Hospital with Covenant Health System [Member] Rehabilitation Hospital [Member] Purchase price of acquisition Business Combination Consideration Transferred1 Number of facilities acquired Number Of Businesses Acquired Estimated development costs. Customer Major Customers [Axis] Customer Name Of Major Customer [Domain] Ernest Health, Inc. Ernest [Member] Ernest Health Inc [Member] Real Estate Property Ownership Real Estate Properties [Axis] Real Estate Properties Real Estate Properties [Domain] Development activities. Development Activities [Member] Development Activities [Member] Estimated total development cost Estimated Development Costs Development projects original commitment amount. Development projects estimated completion date. Circle Health Group. Circle Health [Member] Circle Health [Member] Surgery partners. Surgery Partners [Member] Surgery Partners [Member] Birmingham UK Birmingham, England [Member] Birmingham Uk [Member] Idaho Falls Id [Member] Idaho Falls, ID [Member] Idaho Falls Id [Member] Commitment Development Projects Original Commitment Amount Costs Incurred as of March 31, 2018 Contract Revenue Cost Estimated Completion Date Development Projects Estimated Completion Date Disposal group including discontinued operation loss gain on write down. Debt Instrument [Table] Debt Instrument [Table] Steward Health Care System LLC. Steward Health Care System LLC [Member] Steward Health Care System L L C [Member] Name of Property Real Estate And Accumulated Depreciation Description Of Property [Axis] Name of Property Real Estate And Accumulated Depreciation Name Of Property [Domain] Houston, Texas [Member] Houston, Texas [Member] Houston Texas [Member] Real Estate, Type of Property Mortgage Loans On Real Estate Description Type Of Property [Axis] Real Estate Mortgage Loans On Real Estate Name Property Type [Domain] St Joseph Medical Center [Member] St. Joseph Medical Center [Member] St Joseph Medical Center [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Gain on real estate dispositions Gain Loss On Disposition Of Real Estate Discontinued Operations Gain offset by non-cash charges Disposal Group Including Discontinued Operation Loss Gain On Write Down Proceeds from sale of facilities Proceeds From Sale Of Real Estate Number of direct financing leases. Prime facilities. Prime Facilities [Member] Prime Facilities [Member] Alecto healthcare services. Alecto Healthcare Services [Member] Alecto Healthcare Services [Member] Vibra Healthcare, LLC. Vibra Healthcare, LLC [Member] Vibra Healthcare L L C [Member] Acute care hospital. Acute Care Hospital [Member] Acute Care Hospital [Member] Number of direct financing leases Number Of Direct Financing Leases Estimated residual values. Minimum lease payments receivable Capital Leases Future Minimum Payments Receivable Estimated residual values Estimated Residual Values Less: Unearned income Deferred Revenue Leases Net Net investment in direct financing leases Number of lease extension options. Lease extension period. Unbilled direct finance lease rent write off. Term of lease, years Lessor Leasing Arrangements Operating Leases Term Of Contract Number of lease extension options Number Of Lease Extension Options Term of lease extension, years Lease Extension Period Write off of unbilled direct finance lease rent Unbilled Direct Finance Lease Rent Write Off Amortization of straight line rent receivable. Number of properties disposed. Number of Properties Number of facilities expected to sell or re-lease Adeptus health. Adeptus Health [Member] Adeptus Health [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Number of properties closed Number Of Properties Closed On Number of properties Number Of Properties Amortization of straight line rent receivable Amortization Of Straight Line Rent Receivable Number of facilities expected to sell or re-lease Number Of Facilities Expected To Sell Or Release Gilbert and Florence facilities. Gilbert and Florence Facilities [Member] Gilbert And Florence Facilities [Member] Total budgeted investment Investments Loans [Line Items] Loans [Table] Loans [Table] Loans [Table] Receivable Type Accounts Notes Loans And Financing Receivable By Receivable Type [Axis] Receivable Receivable Type [Domain] Acquisition loan. Acquisition Loans [Member] Acquisition Loan [Member] Working capital loans. Working Capital and Other Loans [Member] Working Capital Loans [Member] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Mortgage Loans [Member] Mortgages [Member] Loans [Line Items] Loans [Line Items] Loans, Balance Loans Receivable Net Ernest Health Inc and other acquisitions. Ernest Transaction and Other Acquisitions [Member] Ernest Health Inc And Other Acquisitions [Member] Existing mortgage loans Mortgage Loans On Real Estate Investment and revenue from external customers. Investment and Revenue From External Customers [Table] Investment And Revenue From External Customers [Table] Investment And Revenue From External Customers [Table] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Revenue. Revenue [Member] Revenue [Member] Prime Health Care Services. Prime [Member] Prime Health Care Services [Member] Steward. Steward [Member] Steward [Member] Median. MEDIAN [Member] Median [Member] RCCH Healthcare Partners. RCCH [Member] R C C H Healthcare Partners [Member] Other operators. Other Operators [Member] Other Operators [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Credit Concentration Risk [Member] Credit Concentration Risk [Member] Investment And Revenue From External Customers [Line Items] Investment And Revenue From External Customers [Line Items] Total Revenue Percentage of Total Revenue Concentration Risk Percentage1 Investment and revenue from external customers by geographic area. Investment And Revenue From External Customers By Geographic Area [Table] Investment And Revenue From External Customers By Geographic Area [Table] Investment And Revenue From External Customers By Geographic Area [Table] Massachusetts [Member] MASSACHUSETTS Texas [Member] TEXAS Utah [Member] UTAH California [Member] CALIFORNIA Arizona [Member] ARIZONA Other states. All Other States [Member] Other States [Member] United States [Member] UNITED STATES Italy Spain and United Kingdom. United Kingdom, Italy, and Spain [Member] Italy Spain And United Kingdom [Member] International. International [Member] International [Member] Investment And Revenue From External Customers By Geographic Area [Line Items] Investment And Revenue From External Customers By Geographic Area [Line Items] Total Gross Assets [Member] Assets Total [Member] Other assets operators. Other Assets Operators Other Assets Operators [Member] Total Gross Assets Percentage of Total Gross Assets Financial Instrument Financial Instrument [Axis] Financial Instruments Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Mortgage Loans [Member] Commercial Real Estate [Member] Other domestic. Other Domestic Assets [Member] Other Domestic [Member] Other international states. Other International States Other International States [Member] Number of investments. Maximum percentage of entity's gross assets invested on single property. Scenario Statement Scenario [Axis] Scenario, Unspecified Scenario Unspecified [Domain] Pro Forma [Member] Pro Forma [Member] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Number of investment in property Number Of Investments Maximum percentage of entity's gross assets invested on single property Maximum Percentage Of Entitys Gross Assets Invested On Single Property Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Term loans. Term Loans [Member] Term Loans [Member] Four point zero zero zero percentage senior unsecured notes due two thousand twenty four. 4.000% Senior Unsecured Notes due 2022 [Member] Four Point Zero Zero Zero Percentage Senior Unsecured Notes Due Two Thousand Twenty Four [Member] Five point five zero zero percentage senior unsecured notes due two thousand twenty four. 5.500% Senior Unsecured Notes Due 2024 [Member] Five Point Five Zero Zero Percentage Senior Unsecured Notes Due Two Thousand Twenty Four [Member] Three point three two five percentage senior unsecured notes due two thousand and twenty five. 3.325% Senior Unsecured Notes Due 2025 [Member] Three Point Three Two Five Percentage Senior Unsecured Notes Due Two Thousand And Twenty Five [Member] Six point three seven five percentage senior unsecured notes due two thousand twenty four. 6.375% Senior Unsecured Notes due 2024 [Member] Six Point Three Seven Five Percentage Senior Unsecured Notes Due Two Thousand Twenty Four [Member] Five point two five zero percentage senior unsecured notes due two thousand twenty six. 5.250% Senior Unsecured Notes Due 2026 [Member] Five Point Two Five Zero Percentage Senior Unsecured Notes Due Two Thousand Twenty Six [Member] Five point zero zero zero percentage senior unsecured notes due two thousand twenty seven. 5.000% Senior Unsecured Notes Due 2027 [Member] Five Point Zero Zero Zero Percentage Senior Unsecured Notes Due Two Thousand Twenty Seven [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Debt Debt Instrument Carrying Amount Debt issue costs, net Deferred Finance Costs Net Debt, net GBP-denominated Borrowings [Member] GBP-denominated Borrowings [Member] G B P Denominated Borrowings [Member] Senior unsecured notes, interest rate Debt Instrument Interest Rate Stated Percentage Long term Debt, Maturities, Repayments of Principal in Year Five and Thereafter 2018 Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year 2019 Long Term Debt Maturities Repayments Of Principal In Year Two 2020 Long Term Debt Maturities Repayments Of Principal In Year Three 2021 Long Term Debt Maturities Repayments Of Principal In Year Four 2022 Long Term Debt Maturities Repayments Of Principal In Year Five Thereafter Long Term Debt Maturities Repayments Of Principal In Year Five And Thereafter Total Decrease in unsecured debt from previous facility. Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Unsecured Revolving Credit Facility [Member] Unsecured Revolving Credit Facility [Member] Unsecured Revolving Credit Facility [Member] Five point seven five zero percentage senior unsecured notes due two thousand and twenty. 5.750% Senior Unsecured Notes Due 2020 [Member] Five Point Seven Five Zero Percentage Senior Unsecured Notes Due Two Thousand And Twenty [Member] Amount of senior unsecured debt Unsecured Debt Decrease in unsecured debt from previous facility Decrease In Unsecured Debt From Previous Facility Senior notes, redemption date Debt Instrument Redemption Period End Date Amount of senior unsecured debt redeemed Repayments Of Unsecured Debt Senior unsecured notes, redemption description Debt Instrument Redemption Description Senior unsecured notes face amount Debt Instrument Face Amount Prepaid and extinguished term loans Extinguishment Of Debt Amount Debt refinancing charge Percentage of dividends payable on basis of adjusted operating funds. Percentage of dividends payable on senior unsecured notes. Maximum percentage of unencumbered assets. Percentage of dividends which could be paid from adjusted operating funds Percentage Of Dividends Payable On Basis Of Adjusted Operating Funds Percentage of dividends which could be paid from operation funds Percentage Of Dividends Payable On Senior Unsecured Notes Maximum percentage of total unencumbered assets Maximum Percentage Of Unencumbered Assets Loans. Interest and rent receivables, Book value Loans, Book value Loans Debt, net Book value Interest and rent receivables, Fair value Receivables Fair Value Disclosure Loans, Fair value Loans Held For Sale Fair Value Disclosure Debt, net Fair value Long Term Debt Fair Value Financial Instruments Measured At Fair Value On Recurring Basis [Line Items] Financial Instruments Measured At Fair Value On Recurring Basis [Table] Financial Instruments Measured At Fair Value On Recurring Basis [Table] Financial Instruments Measured At Fair Value On Recurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value Measurements, Recurring [Member] Fair Value Measurements Recurring [Member] Investment Investment [Axis] Investment Investment [Domain] Mortgage Loans [Member] Mortgage Loans [Member] Mortgage Loans [Member] Equity method investments and other loans. Equity Method Investments and Other Loans [Member] Equity Method Investments And Other Loans [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Other loans and other assets. Other Loans and Other Assets [Member] Other Loans And Other Assets [Member] Financial Instruments Measured At Fair Value On Recurring Basis [Line Items] Financial Instruments Measured At Fair Value On Recurring Basis [Line Items] Fair Value Investment Owned At Fair Value Original Cost Investment Owned At Cost Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Adjustment for DLOM on our equity investment Fair Value Inputs Discount Rate Estimated Increase (Decrease) In Fair Value Of Financial Instrument Plus Hundred Basis Points Estimated Increase (Decrease) In Fair Value Of Financial Instrument Minus Hundred Basis Points Estimated Increase (Decrease) In Fair Value of Financial Instruments plus 100 basis points Estimated Increase Decrease In Fair Value Of Financial Instrument Plus Hundred Basis Points Estimated Increase (Decrease) In Fair Value of Financial Instruments minus 100 basis points Estimated Increase Decrease In Fair Value Of Financial Instrument Minus Hundred Basis Points Unrealized gain/loss on investments Unrealized Gain Loss On Investments Undistributed earning allocated to participating securities. Net income less participating securities share in earnings. Schedule Of Earnings Per Share Basic By Common Class [Table] Schedule Of Earnings Per Share Basic By Common Class [Table] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share Basic [Line Items] Non-controlling interests’ share in net income Income Loss From Continuing Operations Attributable To Noncontrolling Entity Participating securities’ share in earnings Undistributed Earning Allocated To Participating Securities Net income, less participating securities’ share in earnings Net Income Less Participating Securities Share In Earnings Basic weighted-average common shares Dilutive potential common shares Incremental Common Shares Attributable To Share Based Payment Arrangements Dilutive weighted-average common shares Commitment And Contingencies [Line Items] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Washington and Idaho. Washington and Idaho [Member] Washington And Idaho [Member] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items]