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v3.19.3.a.u2

Debt (Narrative) (Details) € in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 19, 2014 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 EUR (€) | Mar. 14, 2019 USD ($) | Dec. 31, 2015 EUR (€) | Sep. 30, 2014 USD ($) | Jul. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Outstanding credit facility balance |  |  |  | $ 288,765,000 | $ 398,937,000 |  |  |  |  |  |  |
Interest paid |  |  |  | $ 29,700,000 | 34,700,000 | $ 37,600,000 |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consolidated leverage ratio under credit facility & note payable, maximum |  |  |  | 3.50% |  |  |  |  |  |  |  |
Outdated Unsecured Short Term Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowing capacity |  | $ 700,000,000 |  |  |  |  |  |  |  |  |  |
Amended And Restated Unsecured Short Term Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowing capacity |  | $ 850,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  | 5 years |  |  |  |  |  |  |  |  |  |
Outstanding credit facility balance |  |  |  | $ 288,800,000 | $ 398,900,000 |  |  |  |  |  |  |
Credit Facility weighted average interest rates on outstanding balance |  |  |  | 2.78% | 3.63% |  | 2.78% |  |  |  |  |
Reduction of credit facility availability |  |  |  | $ 1,400,000 | $ 1,300,000 |  |  |  |  |  |  |
Consolidated leverage ratio under credit facility & note payable, maximum |  |  |  | 3.50% |  |  |  |  |  |  |  |
Amended And Restated Unsecured Short Term Revolving Credit Facility | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  |  | 30 days |  |  |  |  |  |  |  |
Commitment fees |  |  |  | 0.075% |  |  |  |  |  |  |  |
Amended And Restated Unsecured Short Term Revolving Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  |  | 180 days |  |  |  |  |  |  |  |
Commitment fees |  |  |  | 0.25% |  |  |  |  |  |  |  |
Amended And Restated Unsecured Short Term Revolving Credit Facility | LIBOR | Minimum |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period |  |  |  | 0.875% |  |  |  |  |  |  |  |
Amended And Restated Unsecured Short Term Revolving Credit Facility | LIBOR | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period |  |  |  | 1.375% |  |  |  |  |  |  |  |
Amended And Restated Unsecured Short Term Revolving Credit Facility | Prime Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Credit spread during period |  |  |  | 0.375% |  |  |  |  |  |  |  |
Uncommitted Shelf Facility |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term | 15 years |  |  |  |  |  |  |  |  |  |  |
Principal Amount | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |
2023 Series A Notes and 2025 Series B Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  |  |  |  |  |  |  |  | $ 150,000,000
2023 Series A Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  | $ 75,000,000
Stated interest rate |  |  |  | 3.94% |  |  | 3.94% |  |  |  |  | 3.94%
2025 Series B Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  | $ 75,000,000
Stated interest rate |  |  |  | 4.04% |  |  | 4.04% |  |  |  |  | 4.04%
2026 Senior Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 75,000,000 |  |  |  |  |  | $ 75,000,000 |  |
Stated interest rate |  |  |  | 3.72% |  |  | 3.72% |  |  | 3.72% |  |
2021 Series A Notes and 2024 Series B Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  |  |  |  |  |  |  |  | $ 125,000,000 |
2021 Series A Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 50,000,000 |  |  |  |  |  |  | $ 50,000,000 |
Stated interest rate |  |  |  | 3.32% |  |  | 3.32% |  |  |  | 3.32% |
2024 Series B Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 75,000,000 |  |  |  |  |  |  | $ 75,000,000 |
Stated interest rate |  |  |  | 3.76% |  |  | 3.76% |  |  |  | 3.76% |
2025 Series C Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount | € |  |  |  |  |  |  | € 88,857 |  | € 88,900 |  |  |
Stated interest rate |  | 1.785% |  | 1.785% |  |  | 1.785% |  | 1.785% |  |  |
2022 Series A Notes and 2027 Series B Notes [Member] | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount | 150,000,000 |  |  |  |  |  |  |  |  |  |  |
2022 Series A Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  | 7 years |  |  |  |  |  |  |  |  |
Principal Amount | $ 75,000,000 |  |  | $ 75,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 3.25% |  |  | 3.25% |  |  | 3.25% |  |  |  |  |
2027 Series B Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, term |  |  | 12 years |  |  |  |  |  |  |  |  |
Principal Amount | $ 75,000,000 |  |  | $ 75,000,000 |  |  |  |  |  |  |  |
Stated interest rate | 3.72% |  |  | 3.72% |  |  | 3.72% |  |  |  |  |
2029 Series C Notes | Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Principal Amount |  |  |  | $ 100,000,000 |  |  |  | $ 100,000,000 |  |  |  |
Stated interest rate |  |  |  | 4.19% |  |  | 4.19% | 4.19% |  |  |  |

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