Geographic Segments - Schedule of Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Products									$ 433,012	$ 685,364	$ 773,205
Services									105,719	158,946	157,752
Total revenues	$ 106,091	$ 123,640	$ 142,439	$ 166,561	$ 201,630	$ 201,402	$ 215,276	$ 226,002	538,731	844,310	930,957
Depreciation and amortization									31,857	30,477	31,155
Income before income taxes									115,868	249,771	279,380
Total Long-Lived Assets	404,693				303,952				404,693	303,952	322,011
Total Assets	1,461,404				1,428,250				1,461,404	1,428,250	1,449,251
Intercompany [Member]
Segment Reporting Information [Line Items]
Total revenues									46,075	64,352	68,978
Consolidation, Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenues									(46,075)	(64,352)	(68,978)
Income before income taxes									1,974	9,768	2,726
Total Long-Lived Assets	(480)				(2,926)				(480)	(2,926)	(2,926)
Total Assets	(2,526)				(13,705)				(2,526)	(13,705)	(12,307)
Western Hemisphere [Member]
Segment Reporting Information [Line Items]
Products									254,359	332,452	430,597
Services									63,350	88,376	74,544
Western Hemisphere [Member] | Intercompany [Member]
Segment Reporting Information [Line Items]
Total revenues									43,856	53,429	55,094
Western Hemisphere [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues									361,565	474,257	560,235
Depreciation and amortization									22,455	20,301	20,851
Income before income taxes									40,280	112,499	143,206
Total Long-Lived Assets	317,875				208,408				317,875	208,408	221,597
Total Assets	775,358				677,460				775,358	677,460	731,448
Eastern Hemisphere [Member]
Segment Reporting Information [Line Items]
Products									106,862	234,853	205,185
Services									34,818	52,963	59,794
Eastern Hemisphere [Member] | Intercompany [Member]
Segment Reporting Information [Line Items]
Total revenues									337	5,799	10,719
Eastern Hemisphere [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues									142,017	293,615	275,698
Depreciation and amortization									4,965	5,685	5,794
Income before income taxes									60,835	89,349	79,146
Total Long-Lived Assets	33,338				43,449				33,338	43,449	45,517
Total Assets	318,529				391,672				318,529	391,672	375,781
Asia-Pacific [Member]
Segment Reporting Information [Line Items]
Products									71,791	118,059	137,423
Services									7,551	17,607	23,414
Asia-Pacific [Member] | Intercompany [Member]
Segment Reporting Information [Line Items]
Total revenues									1,882	5,124	3,165
Asia-Pacific [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues									81,224	140,790	164,002
Depreciation and amortization									4,437	4,491	4,510
Income before income taxes									12,779	38,155	54,302
Total Long-Lived Assets	53,960				55,021				53,960	55,021	57,823
Total Assets	$ 370,043				$ 372,823				$ 370,043	$ 372,823	$ 354,329