Geographic Segments - Schedule of Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 97,335	$ 93,257	$ 94,861	$ 99,173	$ 107,973	$ 100,346	$ 127,922	$ 119,228	$ 384,626	$ 455,469	$ 538,731
Depreciation and amortization									35,312	40,974	31,857
Income (loss) before taxes									(114,989)	(65,644)	115,868
Total long-lived assets	339,529				391,256				339,529	391,256
Total assets	1,192,510				1,399,805				1,192,510	1,399,805
Intercompany
Segment Reporting Information [Line Items]
Revenues									17,411	29,107	46,075
Eliminations
Segment Reporting Information [Line Items]
Revenues									(17,411)	(29,107)	(46,075)
Total long-lived assets	(395,938)				(414,814)				(395,938)	(414,814)
Total assets	(458,682)				(416,170)				(458,682)	(416,170)
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization									2,635	2,374	1,060
Income (loss) before taxes									(102,538)	(53,852)	(48,967)
Western Hemisphere
Segment Reporting Information [Line Items]
Revenues									249,885	309,689	361,565
Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization									23,314	30,441	21,396
Income (loss) before taxes									(29,823)	(18,099)	91,221
Total long-lived assets	412,624				482,636				412,624	482,636
Total assets	708,723				877,779				708,723	877,779
Western Hemisphere | Intercompany
Segment Reporting Information [Line Items]
Revenues									13,343	27,554	43,856
Western Hemisphere | Eliminations
Segment Reporting Information [Line Items]
Revenues									0	0	0
Eastern Hemisphere
Segment Reporting Information [Line Items]
Revenues									107,055	98,483	142,017
Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization									4,578	4,096	4,965
Income (loss) before taxes									20,495	1,379	60,835
Total long-lived assets	256,899				264,828				256,899	264,828
Total assets	788,171				752,967				788,171	752,967
Eastern Hemisphere | Intercompany
Segment Reporting Information [Line Items]
Revenues									2,010	772	337
Eastern Hemisphere | Eliminations
Segment Reporting Information [Line Items]
Revenues									0	0	0
Asia-Pacific
Segment Reporting Information [Line Items]
Revenues									45,097	76,404	81,224
Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization									4,785	4,063	4,436
Income (loss) before taxes									(3,123)	4,928	12,779
Total long-lived assets	65,944				58,606				65,944	58,606
Total assets	$ 154,298				$ 185,229				154,298	185,229
Asia-Pacific | Intercompany
Segment Reporting Information [Line Items]
Revenues									2,058	781	1,882
Asia-Pacific | Eliminations
Segment Reporting Information [Line Items]
Revenues									0	0	0
Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues									265,052	351,132	433,012
Products | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									170,282	217,085	254,359
Products | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									71,719	69,664	106,862
Products | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									23,051	64,383	71,791
Technical Advisory | Operating Segments
Segment Reporting Information [Line Items]
Revenues									56,615	50,925	46,331
Technical Advisory | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									29,973	28,053	22,554
Technical Advisory | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									16,499	15,313	19,568
Technical Advisory | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									10,143	7,559	4,209
Reconditioning | Operating Segments
Segment Reporting Information [Line Items]
Revenues									15,799	11,020	17,763
Reconditioning | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									10,985	8,846	13,049
Reconditioning | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									3,188	1,958	4,116
Reconditioning | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									1,626	216	598
Total Services (excluding rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues									72,414	61,945	64,094
Total Services (excluding rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									40,958	36,899	35,603
Total Services (excluding rental tools) | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									19,687	17,271	23,684
Total Services (excluding rental tools) | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									11,769	7,775	4,807
Leasing | Operating Segments
Segment Reporting Information [Line Items]
Revenues									47,160	42,392	41,625
Leasing | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									25,302	28,151	27,747
Leasing | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									13,639	10,776	11,134
Leasing | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									8,219	3,465	2,744
Total Services (including rental tools) | Operating Segments
Segment Reporting Information [Line Items]
Revenues									119,574	104,337	105,719
Total Services (including rental tools) | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									66,260	65,050	63,350
Total Services (including rental tools) | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									33,326	28,047	34,818
Total Services (including rental tools) | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									19,988	11,240	7,551
Transferred at Point in Time | Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues									204,472	294,118	358,041
Transferred at Point in Time | Products | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									135,687	215,907	250,466
Transferred at Point in Time | Products | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									49,216	43,260	76,647
Transferred at Point in Time | Products | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									19,569	34,951	30,928
Transferred over Time | Products | Operating Segments
Segment Reporting Information [Line Items]
Revenues									60,580	57,014	74,971
Transferred over Time | Products | Western Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									34,595	1,178	3,893
Transferred over Time | Products | Eastern Hemisphere | Operating Segments
Segment Reporting Information [Line Items]
Revenues									22,503	26,404	30,215
Transferred over Time | Products | Asia-Pacific | Operating Segments
Segment Reporting Information [Line Items]
Revenues									$ 3,482	$ 29,432	$ 40,863