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Long-Term Debt
 6 Months Ended
Jun. 30, 2019
Debt Disclosure [Abstract]  
Long-Term Debt
Long-Term Debt
Long-term debt includes the following:
 
June 30,
2019
 
June 30,
2018
 
December 31,
2018
 
(In thousands)
2010 Senior Notes due October 2020 and October 2040
$
500,000

 
$
500,000

 
$
500,000

2011 Senior Notes due November 2041
300,000

 
300,000

 
300,000

2013 Senior Notes due March 2023
250,000

 
250,000

 
250,000

2016 Senior Notes due August 2021
350,000

 
350,000

 
350,000

2017/2018 Senior Notes due December 2025
1,500,000

 
1,500,000

 
1,500,000

Debt issuance costs and debt discount
(44,806
)
 
(51,823
)
 
(48,277
)

2,855,194

 
2,848,177

 
2,851,723

Less: current portion
—

 
—

 
—


$
2,855,194

 
$
2,848,177

 
$
2,851,723