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Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2020
Long-Term Debt.  
Schedule of long-term debt

Long-term debt as of December 31, 2019 and June 30, 2020 consisted of the following items (in thousands):

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December 31,

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June 30,

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2019

   

2020

​

Credit Facility (a)

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$

552,000

​

​

926,000

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5.375% senior notes due 2021 (b)

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​

952,500

​

​

516,202

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5.125% senior notes due 2022 (c)

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​

923,041

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​

756,030

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5.625% senior notes due 2023 (d)

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​

750,000

​

​

743,690

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5.00% senior notes due 2025 (e)

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​

600,000

​

​

590,000

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Net unamortized premium

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​

791

​

​

542

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Net unamortized debt issuance costs

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​

(19,464)

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​

(14,388)

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Long-term debt

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$

3,758,868

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​

3,518,076

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