Segment Information - Depreciation and amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Information
Depreciation and amortization	$ 665,072	$ 693,381	$ 853,699
Operating segments | U.S. Drilling
Segment Information
Depreciation and amortization	311,759	326,361	398,326
Operating segments | Canada Drilling
Segment Information
Depreciation and amortization		11,604	24,784
Operating segments | International Drilling
Segment Information
Depreciation and amortization	329,335	323,431	377,599
Operating segments | Drilling Solutions
Segment Information
Depreciation and amortization	20,829	26,660	40,074
Operating segments | Rig Technologies
Segment Information
Depreciation and amortization	5,794	8,191	15,299
Other reconciling items
Segment Information
Depreciation and amortization	$ (2,645)	$ (2,866)	$ (2,383)