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Debt and Credit Agreements (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of Long-term Debt and Credit Agreements | The Company's debt and credit agreements consisted of the following:
| December 31,
(In thousands) | 2020 |  | 2019
Total debt |  |  |
6.51% weighted-average senior notes (1) | $ | 37,000 |  |  | $ | 124,000 |
5.58% weighted-average senior notes (2) | 175,000 |  |  | 175,000 |
3.65% weighted-average senior notes (3) | 925,000 |  |  | 925,000 |
Revolving credit facility | — |  |  | — |
Unamortized debt issuance costs | (3,076) |  |  | (3,975) |
| $ | 1,133,924 |  |  | $ | 1,220,025 |
_______________________________________________________________________________ (1)Includes $87.0 million of current portion of long-term debt at December 31, 2019, which the Company repaid in July 2020. (2)Includes $88.0 million of current portion of long-term debt at December 31, 2020, which the Company repaid in January 2021. (3)Includes $100.0 million of current portion of long-term debt at December 31, 2020 due in September 2021. The notes have bullet maturities and were issued in three separate tranches as follows:
| Principal |  | Term |  | Maturity Date |  | Coupon
Tranche 1 | $ | 245,000,000 |  |  | 10 years |  | July 2018 |  | 6.44 | %
Tranche 2 | $ | 100,000,000 |  |  | 12 years |  | July 2020 |  | 6.54 | %
Tranche 3 | $ | 80,000,000 |  |  | 15 years |  | July 2023 |  | 6.69 | %
The notes have bullet maturities and were issued in three separate tranches as follows:
| Principal |  | Term |  | Maturity Date |  | Coupon
Tranche 1 | $ | 88,000,000 |  |  | 10 years |  | January 2021 |  | 5.42 | %
Tranche 2 | $ | 25,000,000 |  |  | 12 years |  | January 2023 |  | 5.59 | %
Tranche 3 | $ | 62,000,000 |  |  | 15 years |  | January 2026 |  | 5.80 | %
The notes have bullet maturities and were issued in three separate tranches as follows:
| Principal |  | Term |  | Maturity Date |  | Coupon
Tranche 1 | $ | 100,000,000 |  |  | 7 years |  | September 2021 |  | 3.24 | %
Tranche 2 | $ | 575,000,000 |  |  | 10 years |  | September 2024 |  | 3.67 | %
Tranche 3 | $ | 250,000,000 |  |  | 12 years |  | September 2026 |  | 3.77 | %

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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