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Mortgages and Notes Payable (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) numberOfBuildings extension | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 28, 2022 USD ($)
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | $ 2,788,915,000 | $ 2,470,021,000 |  |
Less-unamortized debt issuance costs | (15,207,000) | (13,981,000) |  |
Scheduled future principal payments [Abstract] |  |  |  |
2022 | 206,524,000 |  |  |
2023 | 257,059,000 |  |  |
2024 | 7,365,000 |  |  |
2025 | 77,176,000 |  |  |
2026 | 6,911,000 |  |  |
Thereafter | 2,249,087,000 |  |  |
Less-unamortized debt issuance costs | (15,207,000) | (13,981,000) |  |
Mortgages and notes payable, net | 2,788,915,000 | 2,470,021,000 |  |
Gains/(losses) on debt extinguishment | $ (286,000) | (3,674,000) | $ (640,000) |
Lender covenant compliance to accelerate outstanding borrowings | 51.00% |  |  |
Cross-default minimum threshold | $ 35,000,000 |  |  |
Holders covenant compliance of bonds | 25.00% |  |  |
Uncured covenant compliance default period | 60 days |  |  |
Maximum liquidity requirements | 1 year |  |  |
Capitalized Interest [Abstract] |  |  |  |
Capitalized Interest | $ 9,600,000 | $ 8,300,000 | $ 5,600,000 |
3.20% (3.363% effective rate) Notes due 2021 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Gains/(losses) on debt extinguishment | (100,000) |  |  |
Principal amount of debt | 150,000,000 |  |  |
Stated interest rate (in hundredths) |  | 3.20% |  |
Early repayment of debt |  | $ 150,000,000 |  |
Purchase price of debt (in hundredths) |  | 101.908% |  |
3.625% (3.752% effective rate) Notes due 2023 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Principal amount of debt | 250,000,000 |  |  |
4.20% (4.234% effective rate) Notes due 2029 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Current interest rate (in hundredths) |  |  | 4.234% |
Scheduled future principal payments [Abstract] |  |  |  |
Debt issuance costs |  |  | $ 3,100,000 |
Principal amount of debt |  |  | $ 350,000,000 |
Stated interest rate (in hundredths) |  |  | 4.20% |
Original issuance discount |  |  | $ 1,000,000 |
3.050% (3.079% effective rate) Notes due 2030 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Current interest rate (in hundredths) |  |  | 3.079% |
Scheduled future principal payments [Abstract] |  |  |  |
Debt issuance costs |  |  | $ 3,400,000 |
Principal amount of debt |  |  | $ 400,000,000 |
Stated interest rate (in hundredths) |  |  | 3.05% |
Original issuance discount |  |  | $ 1,000,000 |
2.600% (2.645% effective rate) Notes due 2031 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Current interest rate (in hundredths) |  | 2.645% |  |
Scheduled future principal payments [Abstract] |  |  |  |
Debt issuance costs |  | $ 3,400,000 |  |
Principal amount of debt |  | $ 400,000,000 |  |
Stated interest rate (in hundredths) |  | 2.60% |  |
Original issuance discount |  | $ 1,600,000 |  |
Revolving Credit Facility due 2022 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Maximum borrowing capacity on revolving credit facility | 750,000,000 | $ 600,000,000 |  |
Additional borrowing capacity on revolving credit facility | $ 550,000,000 |  |  |
Number of additional maturity extensions | extension | 2 |  |  |
Term of optional extensions | 6 months |  |  |
Interest rate, basis spread (in hundredths) | 0.90% |  |  |
Annual facility fee (in hundredths) | 0.20% |  |  |
Debt issuance costs | $ 4,800,000 |  |  |
Gains/(losses) on debt extinguishment | (100,000) |  |  |
Amount outstanding on revolving credit facility | 70,000,000 |  |  |
Outstanding letters of credit on revolving credit facility | 100,000 |  |  |
Unused borrowing capacity on revolving credit facility | $ 679,900,000 |  |  |
Revolving Credit Facility due 2022 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Interest rate | LIBOR |  |  |
PAC Portfolio Acquisition [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Current interest rate (in hundredths) |  | 3.54% |  |
Scheduled future principal payments [Abstract] |  |  |  |
Debt issuance costs | $ 3,500,000 |  |  |
Number of loans assumed in acquisition | numberOfBuildings | 4 |  |  |
Principal amount of debt | $ 403,000,000 |  |  |
Term of debt instrument (in years) | 10 years 8 months 12 days |  |  |
Unsecured Bridge Facility Due 2022 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Maximum borrowing capacity on revolving credit facility | $ 200,000,000 |  |  |
Interest rate, basis spread (in hundredths) | 0.85% |  |  |
Annual facility fee (in hundredths) | 0.20% |  |  |
Debt issuance costs | $ 1,000,000 |  |  |
Gains/(losses) on debt extinguishment | $ (200,000) |  |  |
Term of debt instrument (in years) | 6 months |  |  |
Unsecured Bridge Facility Due 2022 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Interest rate | LIBOR |  |  |
Variable Rate Term Loan due 2022 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Interest rate, basis spread (in hundredths) |  | 1.10% |  |
Gains/(losses) on debt extinguishment |  | $ (3,700,000) | (300,000) |
Principal amount of debt |  |  | 200,000,000 |
Early repayment of debt |  | $ 100,000,000 | $ 100,000,000 |
Variable Rate Term Loan due 2022 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Interest rate basis |  | LIBOR |  |
Variable Rate Term Loan due 2020 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Interest rate, basis spread (in hundredths) |  |  | 1.10% |
Gains/(losses) on debt extinguishment |  |  | $ (400,000) |
Term of debt instrument (in years) |  |  | 7 years |
Early repayment of debt |  |  | $ 225,000,000 |
Variable Rate Term Loan due 2020 [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Interest rate basis |  |  | LIBOR |
Secured indebtedness [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | $ 491,942,000 | $ 93,350,000 |  |
Aggregate undepreciated book value of secured real estate assets | 727,800,000 |  |  |
Annual repayments through principal amortization | 3,800,000 |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 491,942,000 | 93,350,000 |  |
Secured indebtedness [Member] | 4.27% (3.61% effective rate) mortgage loan due 2028 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 115,731,000 | 0 |  |
Unamortized premium | 3,900,000 |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 115,731,000 | 0 |  |
Secured indebtedness [Member] | 4.0% Mortgage Loan Due 2029 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 91,318,000 | 93,350,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 91,318,000 | 93,350,000 |  |
Secured indebtedness [Member] | 3.61% (3.19% effective rate) mortgage loan due 2029 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 84,973,000 | 0 |  |
Unamortized premium | 2,300,000 |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 84,973,000 | 0 |  |
Secured indebtedness [Member] | 3.40% (3.50% effective rate) mortgage loan due 2033 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 69,422,000 | 0 |  |
Unamortized discount | 600,000 |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 69,422,000 | 0 |  |
Secured indebtedness [Member] | 4.60% (3.73% effective rate) mortgage loan due 2037 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 130,498,000 | 0 |  |
Unamortized premium | 10,000,000 |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 130,498,000 | 0 |  |
Unsecured indebtedness [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 2,312,180,000 | 2,390,652,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 2,312,180,000 | 2,390,652,000 |  |
Unsecured indebtedness [Member] | 3.20% (3.363% effective rate) Notes due 2021 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 0 | 149,901,000 |  |
Unamortized discount |  | 100,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 0 | 149,901,000 |  |
Unsecured indebtedness [Member] | 3.625% (3.752% effective rate) Notes due 2023 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 249,726,000 | 249,464,000 |  |
Unamortized discount | 300,000 | 500,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 249,726,000 | 249,464,000 |  |
Unsecured indebtedness [Member] | 3.875% (4.038% effective rate) Notes due 2027 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 297,934,000 | 297,534,000 |  |
Unamortized discount | 2,100,000 | 2,500,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 297,934,000 | 297,534,000 |  |
Unsecured indebtedness [Member] | 4.125% (4.271% effective rate) Notes due 2028 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 347,449,000 | 347,035,000 |  |
Unamortized discount | 2,600,000 | 3,000,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 347,449,000 | 347,035,000 |  |
Unsecured indebtedness [Member] | 4.20% (4.234% effective rate) Notes due 2029 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 349,288,000 | 349,189,000 |  |
Unamortized discount | 700,000 | 800,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 349,288,000 | 349,189,000 |  |
Unsecured indebtedness [Member] | 3.050% (3.079% effective rate) Notes due 2030 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 399,204,000 | 399,106,000 |  |
Unamortized discount | 800,000 | 900,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 399,204,000 | 399,106,000 |  |
Unsecured indebtedness [Member] | 2.600% (2.645% effective rate) Notes due 2031 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 398,579,000 | 398,423,000 |  |
Unamortized discount | 1,400,000 | 1,600,000 |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | 398,579,000 | 398,423,000 |  |
Unsecured indebtedness [Member] | Variable Rate Term Loan (2) due 2022 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | $ 200,000,000 | 200,000,000 |  |
Interest rate under derivative instruments (in hundredths) | 2.79% |  |  |
Current interest rate (in hundredths) | 1.20% |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | $ 200,000,000 | 200,000,000 |  |
Unsecured indebtedness [Member] | Revolving Credit Facility due 2022 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | $ 70,000,000 | 0 |  |
Current interest rate (in hundredths) | 1.00% |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Mortgages and notes payable, net | $ 70,000,000 | $ 0 |  |
Subsequent Event [Member] | Revolving Credit Facility due 2022 [Member] |  |  |  |
Scheduled future principal payments [Abstract] |  |  |  |
Amount outstanding on revolving credit facility |  |  |  | $ 70,000,000
Outstanding letters of credit on revolving credit facility |  |  |  | 100,000
Unused borrowing capacity on revolving credit facility |  |  |  | $ 679,900,000

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