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v3.19.3.a.u2

Unsecured Debt - Summary (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) line_of_credit | Dec. 31, 2018 USD ($) | Nov. 30, 2016 USD ($) | Oct. 31, 2016 USD ($)
Debt Instrument [Line Items] |  |  |  |
Unsecured debt, net | $ 4,763,206,000 | $ 3,799,316,000 |  |
Lines of credit | 55,000,000 | 0 |  |
Total unsecured debt | 4,818,206,000 | 3,799,316,000 |  |
Unamortized debt issuance expense | $ 2,600,000 | 4,200,000 |  |
Number of outstanding lines of credit | line_of_credit | 2 |  |  |
Unsecured Bonds Private Placement - Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured debt, net | $ 199,820,000 | $ 274,624,000 |  |
Weighted Average Maturity In Years | 1 year 6 months |  |  |
Term Loan - Variable Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured debt, net |  |  | $ 350,000,000.0 | $ 225,000,000.0
Weighted average interest rate | 2.70% | 3.00% |  |
Weighted Average Maturity In Years | 2 months 3 days |  |  |
Term Loan - Variable Rate | Carrying Value |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured debt, net | $ 349,189,000 | $ 348,813,000 |  |
Bonds Public Offering - Fixed Rate |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Unsecured debt, net | $ 4,214,197,000 | $ 3,175,879,000 |  |
Weighted average interest rate | 3.80% | 3.90% |  |
Weighted Average Maturity In Years | 7 years 4 months 24 days |  |  |
Unsecured Line of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Lines of credit | $ 55,000,000 | $ 0 |  |
Weighted average interest rate | 2.50% | 3.20% |  |
Unsecured Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, unamortized premium | $ 12,200,000 | $ 7,100,000 |  |
Unamortized debt issuance expense | 24,500,000 | 18,500,000 |  |
Line of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | 1,240,000,000 |  |  |
Unsecured Line of Credit | Line of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Lines of credit | 55,000,000.0 | 0 |  |
Unamortized debt issuance expense | 3,800,000 | $ 3,900,000 |  |
Maximum borrowing capacity | $ 1,200,000,000 |  |  |

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