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Debt (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Summary of Senior Unsecured Notes Issued | In March 2021, the Company issued the following senior unsecured notes:
Senior Unsecured Notes |  | Term |  |  | Interest Rate |  |  | Face Value (in millions) |  |  | Maturity Date |
Series N |  |  | 5 years |  |  |  | 1.68 | % |  | $ | 100 |  |  |  | March 2026 |
Series O |  |  | 10 years |  |  |  | 2.25 | % |  | $ | 400 |  |  |  | March 2031 |
Summary of Outstanding Debt | The Company had the following outstanding debt at December 31, 2021 and 2020 (in thousands):
|  | December 31, 2021 |  |  | December 31, 2020 |
Senior unsecured notes - Series E - 3.97%, due March 2021 |  |  | — |  |  |  | 50,000 |
Senior unsecured notes - Series F - 3.40%, due June 2021 |  |  | — |  |  |  | 100,000 |
Total notes payable and debt, current |  |  | — |  |  |  | 150,000 |
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 K - 3.44%, due May 2026 |  |  | 160,000 |  |  |  | 160,000 |
Senior unsecured notes - Series L - 3.31%, due September 2026 |  |  | 200,000 |  |  |  | 200,000 |
Senior unsecured notes - Series M - 3.53%, due September 2029 |  |  | 300,000 |  |  |  | 300,000 |
Senior unsecured notes - Series N - 1.68%, due March 2026 |  |  | 100,000 |  |  |  | — |
Senior unsecured notes - Series O - 2.25%, due March 2031 |  |  | 400,000 |  |  |  | — |
Credit agreement |  |  | 210,000 |  |  |  | 400,000 |
Unamortized debt issuance costs |  |  | (6,130 | ) |  |  | (3,485 | )
Total long-term debt |  |  | 1,513,870 |  |  |  | 1,206,515 |
Total debt |  | $ | 1,513,870 |  |  | $ | 1,356,515 |
* | Series H senior unsecured notes bear interest at a 3-month LIBOR for that floating rate interest period plus 1.25%.
Schedule of Debt Maturities | Annual maturities of debt outstanding at December 31, 2021 are as follows (in thousands):
|  | Total |
2022 |  | $ | — |
2023 |  |  | 50,000 |
2024 |  |  | 100,000 |
2025 |  |  | — |
2026 |  |  | 670,000 |
Thereafter |  |  | 700,000 |
Total |  | $ | 1,520,000 |

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