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Long-term debt - Additional Required Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
2029 Notes
Debt Instrument [Line Items]
Interest expense	$ 14,299	$ 0	$ 0
DFC amortization	342	0	0
Amortization of premium/discount, net	715	0	0
2027 Notes
Debt Instrument [Line Items]
Interest expense	25,538	32,175	20,269
DFC amortization	759	758	402
Amortization of premium/discount, net	785	805	133
2023 Notes
Debt Instrument [Line Items]
Interest expense	6,230	13,768	20,882
DFC amortization	297	224	294
Amortization of premium/discount, net	$ 388	$ 287	$ 371

X

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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