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Subsequent events (Details) - USD ($)	Apr. 18, 2022	Dec. 31, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Principal amount outstanding		$ 751,397,000
2027 Notes
Subsequent Event [Line Items]
Principal amount outstanding		535,986,000	$ 553,354,000
2027 Notes | Subsequent Event
Subsequent Event [Line Items]
Principal amount outstanding	$ 535,986
Late Tender Offer Consideration	999.38
Early Tender Premium	30
Total Consideration	1,029.38
2023 Notes
Subsequent Event [Line Items]
Principal amount outstanding		$ 201,763,000	$ 216,593,000
2023 Notes | Subsequent Event
Subsequent Event [Line Items]
Principal amount outstanding	201,763
Total Consideration	$ 1,053.6

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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