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Long-Term Debt (Tables)
9 Months Ended
Sep. 30, 2020
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
Long-term debt includes the following:
September 30,
2020
September 30,
2019
December 31,
2019
 (In thousands)
2010 Senior Notes due October 2020$— $250,000 $— 
2010 Senior Notes due October 2040250,000 250,000 250,000 
2011 Senior Notes due November 2041300,000 300,000 300,000 
2013 Senior Notes due March 2023250,000 250,000 250,000 
2016 Senior Notes due August 2021— 350,000 — 
2017/2018 Senior Notes due December 20251,500,000 1,500,000 1,500,000 
2019 Senior Notes due December 2027600,000 — 600,000 
Debt issuance costs and debt discount(47,249)(43,227)(53,249)
$2,852,751 $2,856,773 $2,846,751