Business Segment, Geographic Area, Product and Significant Customer Information - Schedule of Gross Profit (Loss) by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Statistics [Line Items]
Gross profit	$ 54,702	$ 83,791
Advanced Manufacturing Capital Equipment [Member]
Operating Statistics [Line Items]
Gross profit	34,836	57,838
Analytical Solutions Group [Member]
Operating Statistics [Line Items]
Gross profit	7,448	8,100
Europe Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Gross profit	3,191	4,151
Asia Region Sales & Service Operations [Member]
Operating Statistics [Line Items]
Gross profit	8,831	11,861
Corporate, Eliminations and Other [Member]
Operating Statistics [Line Items]
Gross profit	$ 396	$ 1,841