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v3.20.2

Notes Payable (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) instrument | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2018 USD ($) instrument | Dec. 31, 2017 USD ($) instrument | Dec. 31, 2016 USD ($) instrument | Oct. 31, 2015 USD ($) instrument | May 31, 2014 USD ($) instrument | Apr. 30, 2013 USD ($) instrument
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss deferred in other comprehensive income |  | $ 0 | $ 7,818,000 | $ 7,617,000 | $ 11,738,000 |  |  |  |  |  |
Proceeds from notes payable |  |  |  | 692,646,000 | 0 |  |  |  |  |  |
Payment of debt issuance costs |  |  |  | 7,810,000 | 115,000 |  |  |  |  |  |
Payment of make-whole premium |  |  |  | $ 16,679,000 | $ 0 |  |  |  |  |  |
Forward Swap |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of interest rate derivatives terminated | instrument | 3 |  |  |  |  | 2 | 2 | 2 | 4 | 3 | 4
Aggregate notional amount | $ 200,000,000 |  |  |  |  | $ 250,000,000 | $ 250,000,000 | $ 180,000,000 | $ 300,000,000 | $ 225,000,000 | $ 240,000,000
Loss deferred in other comprehensive income | 13,141,000 |  |  |  |  |  |  |  |  |  |
2030 Notes | Loans Payable |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 400,000,000 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 2.50% |  |  |  |  |  |  |  |  |  |
Aggregate purchase price | $ 398,712,000 |  |  |  |  |  |  |  |  |  |
Discount | $ 1,288,000 |  |  |  |  |  |  |  |  |  |
Effective Rate | 2.536% |  |  |  |  |  |  |  |  |  |
Proceeds from notes payable | $ 395,062,000 |  |  |  |  |  |  |  |  |  |
Payment of debt issuance costs | 3,650,000 |  |  |  |  |  |  |  |  |  |
2050 Notes | Loans Payable |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 300,000,000 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 3.10% |  |  |  |  |  |  |  |  |  |
Aggregate purchase price | $ 293,934,000 |  |  |  |  |  |  |  |  |  |
Discount | $ 6,066,000 |  |  |  |  |  |  |  |  |  |
Effective Rate | 3.205% |  |  |  |  |  |  |  |  |  |
Proceeds from notes payable | $ 290,459,000 |  |  |  |  |  |  |  |  |  |
Payment of debt issuance costs | $ 3,475,000 |  |  |  |  |  |  |  |  |  |
2022 Notes | Loans Payable |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate | 3.80% |  |  |  |  |  |  |  |  |  |
Notes payable redeemed | $ 325,000,000 |  |  |  |  |  |  |  |  |  |
Redemption price, percent of principal amount | 100.00% |  |  |  |  |  |  |  |  |  |
Payment of make-whole premium | $ 16,679,000 |  |  |  |  |  |  |  |  |  |

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