Restructuring and Other - Additional Information (Detail) (USD $)	12 Months Ended				3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2013 System Test and Semiconductor Test Employee	Dec. 31, 2012 System Test and Semiconductor Test Employee	Jun. 30, 2012 Semiconductor Test Employee	Dec. 31, 2011 Semiconductor Test Employee	Dec. 31, 2011 System Test
Restructuring Cost and Reserve
Severance benefit and charges	$ 500,000		$ 1,900,000	$ 1,000,000	$ 300,000	$ 1,200,000
Reduction in employees head count			48	19	10	7
Early exit of leased facility			(400,000)				(500,000)
Business acquisition, contingent consideration		8,800,000
Restructuring and other charges		5,800,000
Acquisition Cost		4,600,000
Pension Settlement non US		$ 1,200,000