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v3.19.3.a.u2

Debt - Unsecured Term Loans (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) loan | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jul. 31, 2019 USD ($) | Jul. 25, 2019 USD ($) | Jan. 07, 2019
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Number of term loans | loan | 2 |  |  |  |  |
Outstanding principal balance | $ 1,019,569,000 |  |  |  |  |
Loss on early extinguishment of debt | $ 2,373,000 | $ 0 | $ 274,000 |  |  |
LIBOR | Unsecured Term Loan Due October 2023 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Interest rate at period end |  |  |  |  |  | 2.41%
Less than or equal to 30% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.35% |  |  |  |  |
Greater than 30% but less than or equal to 35% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.40% |  |  |  |  |
Greater than 35% but less than or equal to 40% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.45% |  |  |  |  |
Greater than 40% but less than or equal to 45% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.50% |  |  |  |  |
Greater than 45% but less than or equal to 50% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.65% |  |  |  |  |
Greater than 50% but less than or equal to 55% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.85% |  |  |  |  |
Greater than 55% | LIBOR | $100 Million and $200 Million Term Loans |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 2.00% |  |  |  |  |
Line Of Credit Facility Covenant Actual Results |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Maximum leverage ratio | 0.285 |  |  |  |  |
Unsecured term loan |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Debt instrument, term (in years) | 5 years |  |  |  |  |
Accordion feature, higher borrowing capacity |  |  |  |  | $ 1,200,000,000 |
Unsecured term loan | Unsecured Term Loan Due July 2024 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Debt instrument, term (in years) | 5 years |  |  |  |  |
Outstanding principal balance | $ 350,000,000 | 0 |  |  |  |
Unsecured term loan | Unsecured Term Loan Due April 2022 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Number of term loans | loan | 2 |  |  |  |  |
Outstanding principal balance | $ 0 | 200,000,000 |  |  |  |
Unsecured term loan | Unsecured Term Loan Due October 2023 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Outstanding principal balance | $ 50,000,000 | 50,000,000 |  | $ 50,000,000 |  |
Unsecured term loan | Unsecured Term Loan, $175 million |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Outstanding principal balance |  |  |  |  | $ 175,000,000 |
Unsecured term loan | LIBOR |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.35% |  |  |  |  |
Interest incurred on the facility | $ 13,700,000 | $ 10,600,000 | $ 6,200,000 |  |  |
Unsecured term loan | LIBOR | Unsecured Term Loan Due July 2024 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.40% |  |  |  |  |
Unsecured term loan | LIBOR | Unsecured Term Loan Due April 2022 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.45% |  |  |  |  |
Unsecured term loan | LIBOR | Unsecured Term Loan Due October 2023 |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Basis spread on variable rate | 1.40% |  |  |  |  |
Unsecured term loan | Minimum | Greater than 30% but less than or equal to 35% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.30 |  |  |  |  |
Unsecured term loan | Minimum | Greater than 35% but less than or equal to 40% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.35 |  |  |  |  |
Unsecured term loan | Minimum | Greater than 40% but less than or equal to 45% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.4 |  |  |  |  |
Unsecured term loan | Minimum | Greater than 45% but less than or equal to 50% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.45 |  |  |  |  |
Unsecured term loan | Minimum | Greater than 50% but less than or equal to 55% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.5 |  |  |  |  |
Unsecured term loan | Minimum | Greater than 55% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.55 |  |  |  |  |
Unsecured term loan | Maximum | Less than or equal to 30% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.30 |  |  |  |  |
Unsecured term loan | Maximum | Greater than 30% but less than or equal to 35% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.35 |  |  |  |  |
Unsecured term loan | Maximum | Greater than 35% but less than or equal to 40% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.4 |  |  |  |  |
Unsecured term loan | Maximum | Greater than 40% but less than or equal to 45% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.45 |  |  |  |  |
Unsecured term loan | Maximum | Greater than 45% but less than or equal to 50% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.5 |  |  |  |  |
Unsecured term loan | Maximum | Greater than 50% but less than or equal to 55% |  |  |  |  |  |
Line Of Credit Facility Leverage Range [Line Items] |  |  |  |  |  |
Leverage Ratio | 0.55 |  |  |  |  |

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