Geographic Areas - Schedule of Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Products	$ 102,092	$ 116,048	$ 193,684	$ 251,242
Services	25,830	26,391	53,466	57,758
Revenues	127,922	142,439	247,150	309,000
Depreciation and amortization	12,881	7,725	22,713	15,500
Income before income taxes	(62)	45,748	(10)	95,569
Total Long-Lived Assets	442,018		442,018		$ 404,693
Total Assets	1,466,913		1,466,913		1,461,404
Intercompany [Member]
Segment Reporting Information [Line Items]
Revenues	4,534	10,763	10,534	21,939
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(4,534)	(10,763)	(10,534)	(21,939)
Income before income taxes	(1,342)	1,155	(1,252)	2,689
Total Long-Lived Assets	(20,871)		(20,871)		(480)
Total Assets	(26,108)		(26,108)		(2,526)
Western Hemisphere [Member]
Segment Reporting Information [Line Items]
Products	54,299	62,786	119,587	141,386
Services	16,430	16,783	34,892	33,776
Western Hemisphere [Member] | Intercompany [Member]
Segment Reporting Information [Line Items]
Revenues	4,227	10,505	10,130	21,216
Western Hemisphere [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	74,956	90,074	164,609	196,378
Depreciation and amortization	10,190	5,084	17,327	10,105
Income before income taxes	4,442	26,530	11,914	64,843
Total Long-Lived Assets	374,661		374,661		317,875
Total Assets	777,995		777,995		775,358
Eastern Hemisphere [Member]
Segment Reporting Information [Line Items]
Products	22,441	29,913	36,367	63,074
Services	6,853	8,007	13,128	21,011
Eastern Hemisphere [Member] | Intercompany [Member]
Segment Reporting Information [Line Items]
Revenues	256	22	287	207
Eastern Hemisphere [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	29,550	37,942	49,782	84,292
Depreciation and amortization	1,075	1,362	2,155	2,686
Income before income taxes	2,792	25,050	6,283	41,734
Total Long-Lived Assets	33,813		33,813		33,338
Total Assets	338,703		338,703		318,529
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Products	25,352	23,349	37,730	46,782
Services	2,548	1,601	5,447	2,971
Asia Pacific [Member] | Intercompany [Member]
Segment Reporting Information [Line Items]
Revenues	51	236	117	516
Asia Pacific [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	27,951	25,186	43,294	50,269
Depreciation and amortization	1,014	1,045	2,031	2,249
Income before income taxes	5,796	5,111	7,640	11,224
Total Long-Lived Assets	54,415		54,415		53,960
Total Assets	376,323		376,323		$ 370,043
Corporate Segment | Operating Segments [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	602	234	1,200	460
Income before income taxes	$ (11,750)	$ (12,098)	$ (24,595)	$ (24,921)