Segments and Geographic Area Analysis - Summary of Information about Disaggregated Revenue by Equipment-type and Country (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 276,376	$ 254,020	$ 216,706	$ 233,542	$ 232,522	$ 286,322	$ 268,861	$ 295,510	$ 980,644	$ 1,083,215	$ 1,485,746
Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues									934,934	1,059,973	1,451,219
Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										1,051,560	1,430,075
Contract Drilling [Member] | Jack-up Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										8,413	21,144
Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues									45,710	23,242	34,527
United States [Member]
Segment Reporting Information [Line Items]
Total revenues									515,640	644,423	630,595
United States [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues									507,759	636,987	619,655
United States [Member] | Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										628,574	619,655
United States [Member] | Contract Drilling [Member] | Jack-up Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										8,413
United States [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues									7,881	7,436	10,940
Brazil [Member]
Segment Reporting Information [Line Items]
Total revenues									191,602	170,813	280,487
Brazil [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues									191,519	170,839	280,798
Brazil [Member] | Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										170,839	280,798
Brazil [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues									83	(26)	(311)
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenues									163,760	92,487	177,570
United Kingdom [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues									149,724	84,749	171,146
United Kingdom [Member] | Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										84,749	171,146
United Kingdom [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues									14,036	7,738	6,424
Australia [Member]
Segment Reporting Information [Line Items]
Total revenues									109,642	60,782	140,953
Australia [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues									85,932	53,170	125,568
Australia [Member] | Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										53,170	125,568
Australia [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues									$ 23,710	7,612	15,385
Malaysia [Member]
Segment Reporting Information [Line Items]
Total revenues										114,018	166,972
Malaysia [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues										114,228	164,984
Malaysia [Member] | Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues										114,228	164,984
Malaysia [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues										(210)	1,988
Other Countries [Member]
Segment Reporting Information [Line Items]
Total revenues										692	21,245
Other Countries [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues											21,144
Other Countries [Member] | Contract Drilling [Member] | Jack-up Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues											21,144
Other Countries [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues										$ 692	101
Trinidad [Member]
Segment Reporting Information [Line Items]
Total revenues											67,924
Trinidad [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues											67,924
Trinidad [Member] | Contract Drilling [Member] | Floater Rigs [Member]
Segment Reporting Information [Line Items]
Total revenues											$ 67,924