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Debt and Credit Agreements (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Debt and credit agreement components
The Company’s debt and credit agreements consisted of the following:
(In thousands)March 31,
2021
December 31,
2020
6.51% weighted-average senior notes
$37,000 $37,000 
5.58% weighted-average senior notes(1)
87,000 175,000 
3.65% weighted-average senior notes(2)
925,000 925,000 
Unamortized debt issuance costs(2,877)(3,076)
$1,046,123 $1,133,924 
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(1)Includes $88.0 million of current portion of long-term debt at December 31, 2020, which the Company repaid in January 2021.
(2)Includes $100.0 million of current portion of long-term debt at March 31, 2021 and December 31, 2020 due in September 2021.