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Mortgage Notes Payable, Unsecured Notes and Credit Facility (Details 3) - USD ($) $ in Thousands | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Apr. 30, 2018 | Feb. 28, 2018 | Dec. 31, 2017
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 7,645,437 |  |  | $ 7,404,313
Secured notes |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 158,641 |  |  |
Mortgage notes payable and unsecured notes | 1,286,796 |  |  |
Secured notes | Notes Payable Maturities 2018 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 3,568 |  |  |
Mortgage notes payable and unsecured notes | 51,449 |  |  |
Stated interest rate of unsecured notes (as a percent) |  | 3.06% | 4.61% |
Secured notes | Notes Payable Maturities 2019 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 3,824 |  |  |
Mortgage notes payable and unsecured notes | 114,722 |  |  |
Secured notes | Notes Payable Maturities 2020 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 2,682 |  |  |
Mortgage notes payable and unsecured notes | 140,430 |  |  |
Secured notes | Notes Payable Maturities 2021 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 2,549 |  |  |
Mortgage notes payable and unsecured notes | 27,843 |  |  |
Secured notes | Notes payable maturing in 2022 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 2,723 |  |  |
Secured notes | Notes Payable Maturities 2023 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 2,899 |  |  |
Secured notes | Notes Payable Maturities 2024 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 3,077 |  |  |
Secured notes | Notes Payable Maturities 2025 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 3,268 |  |  |
Mortgage notes payable and unsecured notes | 84,835 |  |  |
Secured notes | Notes Payable Maturities 2026 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 3,485 |  |  |
Secured notes | Notes Payable Maturities 2027 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 2,973 |  |  |
Mortgage notes payable and unsecured notes | 185,100 |  |  |
Secured notes | Notes Payable Maturities Thereafter |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Secured notes payments | 127,593 |  |  |
Mortgage notes payable and unsecured notes | 682,417 |  |  |
Unsecured notes |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | 6,200,000 |  |  |
Unsecured notes | Notes Payable 6.100 Percent Maturities 2020 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 250,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 6.10% |  |  |
Unsecured notes | Notes Payable 3.625 Percent Maturities 2020 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 400,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.625% |  |  |
Unsecured notes | Notes Payable Maturities 2021 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 250,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.95% |  |  |
Unsecured notes | Variable Rate Unsecured Term Loan $300 Million |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 300,000 |  |  |
Unsecured notes | Variable Rate Unsecured Term Loan $300 Million | LIBOR |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) | 0.43% |  |  |
Unsecured notes | Notes payable maturing in 2022 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 450,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 2.95% |  |  |
Unsecured notes | Variable Rate Unsecured Term Loan $100 Million |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 100,000 |  |  |
Unsecured notes | Variable Rate Unsecured Term Loan $100 Million | LIBOR |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) | 0.90% |  |  |
Unsecured notes | Notes payable maturing in 2023 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 350,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 4.20% |  |  |
Unsecured notes | Notes Payable 2.850 Maturities 2023 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 250,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 2.85% |  |  |
Unsecured notes | Notes Payable Maturities 2024 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 300,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.50% |  |  |
Unsecured notes | Variable Rate Unsecured Term Loan $150 Million |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 150,000 |  |  |
Unsecured notes | Variable Rate Unsecured Term Loan $150 Million | LIBOR |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) | 1.50% |  |  |
Unsecured notes | Notes Payable 3.450 Maturities 2025 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 525,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.45% |  |  |
Unsecured notes | Notes Payable 3.500 Maturities 2025 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 300,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.50% |  |  |
Unsecured notes | Notes Payable 2.950 Maturities 2026 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 475,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 2.95% |  |  |
Unsecured notes | Notes Payable 2.900 Maturities 2026 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 300,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 2.90% |  |  |
Unsecured notes | Notes Payable Maturities 2027 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 400,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.35% |  |  |
Unsecured notes | Notes Payable Maturities 2046 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 350,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.90% |  |  |
Unsecured notes | Notes Payable Maturities 2047 |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 300,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 4.15% |  |  |
Unsecured notes | Notes Payable Maturities 2028 [Member] |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 450,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 3.20% |  |  |
Unsecured notes | Notes Payable Maturities 2048 [Member] |  |  |  |
Notes Payable, Unsecured Notes and Credit Facility |  |  |  |
Mortgage notes payable and unsecured notes | $ 300,000 |  |  |
Stated interest rate of unsecured notes (as a percent) | 4.35% |  |  |

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