Business Segment, Geographic Area, Product and Significant Customer Information - Net Revenues by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Statistics [Line Items]
Total net revenues	$ 141,645	$ 190,868
Advanced Manufacturing Capital Equipment [Member]
Operating Statistics [Line Items]
Total net revenues	105,327	143,223
Analytical Solutions Group [Member]
Operating Statistics [Line Items]
Total net revenues	14,396	15,793
Europe Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Total net revenues	11,646	12,206
Asia Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Total net revenues	47,353	72,097
Corporate, Eliminations and Other [Member]
Operating Statistics [Line Items]
Total net revenues	$ (37,077)	$ (52,451)