Segments and Related Information - Financial Information by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 134,759			$ 263,697	$ 500,698	$ 778,993
Depreciation and amortization	24,251			31,366	75,306	94,800
Operating income (loss)	(30,840)			(34,910)	(505,976)	(52,145)
Capital expenditures	2,362			14,255	11,277	45,832
Total assets	1,180,786			1,933,964	1,180,786	1,933,964	$ 1,727,867
Impairments of inventories	5,921		$ 25,230		31,151	0
Impairments of fixed assets	0	$ 2,992	5,198	33,697	8,190	33,697
Impairments of goodwill	0		406,056	0	406,056	0
Corporate
Segment Reporting Information [Line Items]
Revenues	0			0	0	0
Depreciation and amortization	219			189	563	642
Operating income (loss)	(8,249)			(11,932)	(25,633)	(35,666)
Capital expenditures	19			437	(377)	875
Total assets	90,476			41,080	90,476	41,080
Impairments of inventories	0
Impairments of fixed assets		0
Total Well Site Services
Segment Reporting Information [Line Items]
Revenues	37,372			116,000	161,173	340,358
Impairments of goodwill					127,054
Total Well Site Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	37,372			116,000	161,173	340,358
Depreciation and amortization	12,930			20,188	41,334	61,287
Operating income (loss)	(13,872)			(34,776)	(181,746)	(45,937)
Capital expenditures	1,579			6,626	6,554	27,423
Total assets	253,881			518,148	253,881	518,148
Downhole Technologies
Segment Reporting Information [Line Items]
Revenues	18,713			42,882	74,743	143,912
Impairments of inventories			0
Impairments of fixed assets			0		5,900
Impairments of goodwill			192,502		192,502
Downhole Technologies | Operating Segments
Segment Reporting Information [Line Items]
Revenues	18,713			42,882	74,743	143,912
Depreciation and amortization	5,701			5,309	16,904	15,631
Operating income (loss)	(12,594)			659	(216,395)	3,251
Capital expenditures	78			4,045	2,892	11,121
Total assets	294,768			700,789	294,768	700,789
Impairments of inventories	5,921
Impairments of fixed assets		0
Offshore/Manufactured Products
Segment Reporting Information [Line Items]
Revenues	78,674			104,815	264,782	294,723
Impairments of inventories			16,249		16,200
Impairments of fixed assets			0
Impairments of goodwill			86,500		86,500
Offshore/Manufactured Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues	78,674			104,815	264,782	294,723
Depreciation and amortization	5,401			5,680	16,505	17,240
Operating income (loss)	3,875			11,139	(82,202)	26,207
Capital expenditures	686			3,147	2,208	6,413
Total assets	541,661			673,947	541,661	673,947
Impairments of inventories	0
Impairments of fixed assets		0
Impairments of goodwill					86,500
Completion Services | Total Well Site Services
Segment Reporting Information [Line Items]
Impairments of inventories			8,981		9,000
Impairments of fixed assets		3,000	0
Impairments of goodwill			127,054		127,054
Completion Services | Total Well Site Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	34,893			103,966	153,994	307,928
Depreciation and amortization	12,914			17,024	41,032	51,558
Operating income (loss)	(14,330)			1,719	(176,408)	(2,282)
Capital expenditures	1,579			6,088	6,440	24,971
Total assets	248,715			496,684	248,715	496,684
Impairments of inventories	0
Impairments of fixed assets		2,992
Drilling Services | Total Well Site Services
Segment Reporting Information [Line Items]
Impairments of inventories			0
Impairments of fixed assets		$ 3,000	5,198	33,700
Impairments of goodwill			$ 0		0
Drilling Services | Total Well Site Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,479			12,034	7,179	32,430
Depreciation and amortization	16			3,164	302	9,729
Operating income (loss)	458			(36,495)	(5,338)	(43,655)
Capital expenditures	0			538	114	2,452
Total assets	$ 5,166			$ 21,464	$ 5,166	$ 21,464