Mergers and acquisitions - Summary of Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Charges Incurred	$ 18,200	$ 1,176	$ 147	$ 739
Retention Costs [Member] | Seaspine Holdings Corporation [Member]
Restructuring Cost and Reserve [Line Items]
Charges Incurred		18,200
Payments Made / Currency Translation Adjustment		(11,200)
Balance as of December 31, 2023		7,000
U.S. Severance Costs [Member] | Seaspine Holdings Corporation [Member]
Restructuring Cost and Reserve [Line Items]
Charges Incurred		11,200
Payments Made / Currency Translation Adjustment		(10,200)
Balance as of December 31, 2023		1,000
U S Retention Costs [Member] | Seaspine Holdings Corporation [Member]
Restructuring Cost and Reserve [Line Items]
Charges Incurred		5,300
Payments Made / Currency Translation Adjustment		(300)
Balance as of December 31, 2023		5,000
U S Payroll Taxes [Member] | Seaspine Holdings Corporation [Member]
Restructuring Cost and Reserve [Line Items]
Charges Incurred		700
Payments Made / Currency Translation Adjustment		(400)
Balance as of December 31, 2023		300
International Spine Restructuring Severance [Member] | Seaspine Holdings Corporation [Member]
Restructuring Cost and Reserve [Line Items]
Charges Incurred		1,000
Payments Made / Currency Translation Adjustment		(300)
Balance as of December 31, 2023		$ 700