| Summary of Debt |
Debt consists of the following as of December 31: | | | | | | | | | | | | | | | | | | | | | | | | | | | | (In thousands) | | 2024 | | 2024 | | 2023 | | 2023 | | | Carrying Value | | Estimated Fair Value | | Carrying Value | | Estimated Fair Value | 3.85% Senior notes due 2025 | | $ | 90,000 | | | $ | 89,876 | | | $ | 90,000 | | | $ | 88,243 | | 4.24% Senior notes due 2026 | | 200,000 | | | 196,059 | | | 200,000 | | | 195,556 | | 4.05% Senior notes due 2028 | | 67,500 | | | 64,733 | | | 67,500 | | | 64,801 | | 4.11% Senior notes due 2028 | | 90,000 | | | 85,784 | | | 90,000 | | | 85,999 | | 3.10% Senior notes due 2030 | | 150,000 | | | 131,386 | | | 150,000 | | | 131,942 | | 3.20% Senior notes due 2032 | | 150,000 | | | 125,426 | | | 150,000 | | | 127,649 | | 4.49% Senior notes due 2032 | | 200,000 | | | 182,451 | | | 200,000 | | | 187,584 | | 4.64% Senior notes due 2034 | | 100,000 | | | 89,538 | | | 100,000 | | | 92,961 | | | Total debt | | 1,047,500 | | | 965,253 | | | 1,047,500 | | | 974,735 | | | Debt issuance costs, net | | (1,326) | | | (1,326) | | | (1,541) | | | (1,541) | | Unamortized interest rate swap proceeds (1) | | 2,775 | | | 2,775 | | | 4,403 | | | 4,403 | | | Total debt, net | | 1,048,949 | | | 966,702 | | | 1,050,362 | | | 977,597 | | | Less: current portion of long-term debt | | (90,000) | | | (89,876) | | | — | | | — | | | Total long-term debt | | $ | 958,949 | | | $ | 876,826 | | | $ | 1,050,362 | | | $ | 977,597 | |
(1) Represents the gain from termination of the Corporation's interest rate swap agreements on its 3.85% and 4.24% Senior Notes in February 2016, which will be amortized into interest expense over the remaining terms of the respective notes.
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