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Fair value (Tables)

12 Months Ended

Dec. 31, 2021

Schedule of fair value and carrying value of the senior notes and 2026 Convertible Notes


		December 31,
		2020						2021
		Fair			Carrying			Fair			Carrying
		Value ⁽¹⁾			Value ⁽²⁾			Value ⁽¹⁾			Value ⁽²⁾
2022 Notes		$	658,468			658,400			—			—
2023 Notes			562,698			571,370			—			—
2025 Notes			560,500			585,440			594,866			581,117
2026 Notes			—			—			370,013			321,738
2029 Notes			—			—			654,080			577,149
2030 Notes			—			—			641,400			593,234
2026 Convertible Notes			430,963			169,383			331,655			52,206
Total		$	2,212,629			1,984,593			2,592,014			2,125,444

(1)	Fair values are based on Level 2 market data inputs.

(2)	Carrying values are presented net of unamortized debt issuance costs and debt discounts or premiums.

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

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