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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
Long-term debt includes the following:
March 31,
2021
March 31,
2020
December 31,
2020
 (In thousands)
2010 Senior Notes due October 2040$250,000 $250,000 $250,000 
2011 Senior Notes due November 2041300,000 300,000 300,000 
2013 Senior Notes due March 2023250,000 250,000 250,000 
2017/2018 Senior Notes due December 2025275,000 1,500,000 1,500,000 
2019 Senior Notes due December 2027600,000 600,000 600,000 
2021 Senior Notes due April 2026600,000 — — 
2021 Senior Notes due April 2029600,000 — — 
Debt issuance costs and debt discount(37,268)(51,076)(45,336)
$2,837,732 $2,848,924 $2,854,664