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Debt Textuals (Details) € in Thousands, $ in Thousands, SFr in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) Rate | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2019 CHF (SFr) Rate | Dec. 31, 2019 EUR (€) Rate
Debt Instrument [Line Items] |  |  |  |  |
Debt, Weighted Average Interest Rate | Rate | 3.30% |  |  | 3.30% | 3.30%
Senior Notes | $ 714,351 | $ 491,819 |  |  |
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), Reclassification, before Tax | 1,300 | 6,700 | $ 18,200 |  |
Cumulative (gain) loss in other other comprehensive income related to the change in a net investment hedge. | 1,500 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 1,100,000 |  |  |  |
Debt Instrument, Covenant Description | The agreements also require the Company to maintain a consolidated interest coverage ratio of not less than 3.5 to 1.0 and a consolidated leverage ratio of not more than 3.5 to 1.0. |  |  |  |
Debt Instrument, Covenant Compliance | The Company was in compliance with its covenants at December 31, 2019. |  |  |  |
Debt Issuance Costs, Gross | $ 3,400 |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | Rate | 87.50% |  |  |  |
1.47% EURO Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Maturity Date | Jun. 17, 2030 |  |  |  |
Senior Notes | $ 140,197 | 143,053 |  |  | € 125,000
Debt Instrument, Interest Rate, Stated Percentage | 1.47% |  |  | 1.47% | 1.47%
1.30% Euro-Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Maturity Date | Nov. 06, 2034 |  |  |  |
Senior Notes | $ 151,413 | $ 0 |  |  | € 135,000
Debt Instrument, Interest Rate, Stated Percentage | 1.30% |  |  | 1.30% | 1.30%
3.19% Senior Notes [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Maturity Date | Jan. 24, 2035 |  |  |  |
Senior Notes | $ 50,000 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | Rate | 3.19% |  |  | 3.19% | 3.19%
Swiss Pension Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Notes Payable, Related Parties | $ 39,600 |  |  |  |
Swiss Pension Loans (local currency) | SFr |  |  |  | SFr 38 |
Debt Instrument, Basis Spread on Variable Rate | Rate | 87.50% |  |  |  |
Line of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Maturity Date | Jun. 15, 2023 |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | $ 572,300 |  |  |  |
Debt Instrument, Covenant Description | The Company is required to maintain a ratio of funded debt to consolidated EBITDA of 3.5 to 1.0 or less and an interest coverage ratio of 3.5 to 1.0 or greater. |  |  |  |
Debt Instrument, Covenant Compliance | The Company was in compliance with its covenants as of December 31, 2019. |  |  |  |
Debt Issuance Costs, Gross | $ 2,000 |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | Rate | 0.875% |  |  |  |

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