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Debt (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Summary of Outstanding Debt | The Company had the following outstanding debt at December 31, 2018 and 2017 (in thousands):
|  | December 31, |
|  | 2018 |  |  | 2017 |
Foreign subsidiary lines of credit |  | $ | 178 |  |  | $ | 273 |
Senior unsecured notes - Series D - 3.22%, due March 2018 |  |  | — |  |  |  | 100,000 |
Total notes payable and debt, current |  |  | 178 |  |  |  | 100,273 |
Senior unsecured notes - Series B - 5.00%, due February 2020 |  |  | 100,000 |  |  |  | 100,000 |
Senior unsecured notes - Series E - 3.97%, due March 2021 |  |  | 50,000 |  |  |  | 50,000 |
Senior unsecured notes - Series F - 3.40%, due June 2021 |  |  | 100,000 |  |  |  | 100,000 |
Senior unsecured notes - Series G - 3.92%, due June 2024 |  |  | 50,000 |  |  |  | 50,000 |
Senior unsecured notes - Series H - floating rate*, due June 2024 |  |  | 50,000 |  |  |  | 50,000 |
Senior unsecured notes - Series I - 3.13%, due May 2023 |  |  | 50,000 |  |  |  | 50,000 |
Senior unsecured notes - Series J - floating rate**, due May 2024 |  |  | — |  |  |  | 40,000 |
Senior unsecured notes - Series K - 3.44%, due May 2026 |  |  | 160,000 |  |  |  | 160,000 |
Credit agreement |  |  | 590,000 |  |  |  | 1,300,000 |
Unamortized debt issuance costs |  |  | (1,828 | ) |  |  | (2,499 | )
Total long-term debt |  |  | 1,148,172 |  |  |  | 1,897,501 |
Total debt |  | $ | 1,148,350 |  |  | $ | 1,997,774 |
*   Series H senior unsecured notes bear interest at a 3-month LIBOR for that floating rate interest period plus 1.25%. |
**   Series J senior unsecured notes bore interest at a 3-month LIBOR for that floating rate interest period plus 1.45%. |
Schedule of Debt Maturities | Annual maturities of debt outstanding at December 31, 2018 are as follows (in thousands):
|  | Total |
2019 |  | $ | 178 |
2020 |  |  | 100,000 |
2021 |  |  | 150,000 |
2022 |  |  | 590,000 |
2023 |  |  | 50,000 |
Thereafter |  |  | 260,000 |
Total |  | $ | 1,150,178 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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