Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of long-term debt

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

	December 31,
	2019		2020
Credit Facility (a)	$	552,000		1,017,000
5.375% senior notes due 2021 (b)		952,500		—
5.125% senior notes due 2022 (c)		923,041		660,516
5.625% senior notes due 2023 (d)		750,000		574,182
5.00% senior notes due 2025 (e)		600,000		590,000
4.25% convertible senior notes due 2026 (f)		—		287,500
Total principal		3,777,541		3,129,198
Unamortized premium (discount), net		791		(111,886)
Unamortized debt issuance costs		(19,464)		(15,719)
Long-term debt	$	3,758,868		3,001,593

4.25% convertible senior notes due 2026

Schedule of long-term debt

The 2026 Convertible Notes consist of the following as of December 31, 2020 (in thousands):

Liability component:
Principal	$	287,500
Less: unamortized note discount		(112,265)
Less: unamortized debt issuance costs		(5,852)
Net carrying value	$	169,383
Equity component (1)	$	115,601

(1) Recorded in additional paid-in capital, net of $3 million of issuance costs and $28 million of deferred taxes.