Goodwill and Other Purchased Intangible Assets (Tables)

3 Months Ended

Mar. 28, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Value of Goodwill by Reportable Segment

Changes in the carrying value of goodwill by reportable segment during the year ended December 27, 2014 and the three-month period ended March 28, 2015 were as follows (in thousands):

	Semiconductor			Microwave			Total
	Equipment			Communications			Goodwill
Balance, December 28, 2013	$	67,983		$	3,330		$	71,313
Impact of currency exchange		(4,851	)		(275	)		(5,126	)
Impairment of goodwill		—			(3,055	)		(3,055	)
Balance, December 27, 2014		63,132			—			63,132
Impact of currency exchange		(2,806	)		—			(2,806	)
Balance, March 28, 2015	$	60,326		$	—		$	60,326

Purchased Intangible Assets, Subject to Amortization

Purchased intangible assets, subject to amortization are as follows (in thousands):

	March 28, 2015						December 27, 2014
	Gross Carrying		Accumulated		Remaining		Gross Carrying		Accumulated
	Amount		Amortization		Useful Life		Amount		Amortization
Rasco technology	$	26,697	$	21,090		1.8 years	$	29,845	$	22,616
Ismeca technology		27,751		7,950		5.8 years		27,014		6,879
	$	54,448	$	29,040			$	56,859	$	29,495