Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total net revenues	$ 172,387	$ 209,332	$ 217,966	$ 213,839	$ 203,021	$ 186,798	$ 184,697	$ 206,353	$ 813,524	$ 780,869	$ 669,420
Operating Segments [Member] \| Advanced Manufacturing Capital Equipment [Member]
Segment Reporting Information [Line Items]
Total net revenues									662,911	620,303	509,008
Operating Segments [Member] \| Global Service [Member]
Segment Reporting Information [Line Items]
Total net revenues									116,420	107,050	101,103
Operating Segments [Member] \| Asia Region Sales [Member]
Segment Reporting Information [Line Items]
Total net revenues									203,231	183,056	159,781
Operating Segments [Member] \| Other [Member]
Segment Reporting Information [Line Items]
Total net revenues									79,523	82,709	73,235
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Total net revenues									$ (248,561)	$ (212,249)	$ (173,707)