Revenues - Remaining performance obligations (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Revenue
Remaining performance obligation	$ 3,292,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue
Remaining performance obligation	$ 1,309,000
Expected timing of satisfaction	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue
Remaining performance obligation	$ 851,000
Expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue
Remaining performance obligation	$ 1,132,000
Expected timing of satisfaction	1 year