Segments and Geographic Area Analysis - Summary of Information about Disaggregated Revenue by Country (Detail) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Apr. 23, 2021	Jun. 30, 2021	Jun. 30, 2022	Apr. 23, 2021	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 34,562	$ 114,911	$ 205,702	$ 169,379	$ 391,941
Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	30,811	98,033	176,879	153,364	327,131
Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	3,751	16,878	28,823	16,015	64,810
United States [Member]
Segment Reporting Information [Line Items]
Total revenues	20,226	59,500	95,135	100,263	197,656
United States [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	19,171	50,777	79,171	93,215	155,453
United States [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	1,055	8,723	15,964	7,048	42,203
Australia [Member]
Segment Reporting Information [Line Items]
Total revenues	6,900	29,229	35,604	21,728	53,906
Australia [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	5,357	23,949	32,162	17,031	47,860
Australia [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	1,543	5,280	3,442	4,697	6,046
Senegal [Member]
Segment Reporting Information [Line Items]
Total revenues			30,807		59,669
Senegal [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues			26,704		53,820
Senegal [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues			4,103		5,849
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenues	4,226	13,868	21,548	30,267	25,282
United Kingdom [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	3,876	12,915	19,089	27,967	21,395
United Kingdom [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	350	953	2,459	2,300	3,887
Brazil [Member]
Segment Reporting Information [Line Items]
Total revenues		3,224	19,753	3,421	39,019
Brazil [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues		3,224	19,753	3,421	39,019
Myanmar [Member]
Segment Reporting Information [Line Items]
Total revenues	3,210	9,090	2,855	13,700	16,409
Myanmar [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	2,407	7,168		11,730	9,584
Myanmar [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 803	$ 1,922	$ 2,855	$ 1,970	$ 6,825