Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-lived Intangible Assets

The changes in intangible assets for fiscal 2016 and the net book value of intangible assets at December 31, 2016 and December 26, 2015 were as follows (in thousands):

	Intangible Assets, Gross Amount								Accumulated Amortization						Intangible Assets, Net					Weight Average Useful Life
Other Intangible Assets (1)	December 26, 2015		Additions/Disposals			December 31, 2016			December 26, 2015		Expense, net		December 31, 2016		December 26, 2015		December 31, 2016			December 31, 2016
Existing developed technologies	$	52,200	$	90,501		$	142,701		$	39,581	$	16,550	$	56,131	$	12,619	$	86,569		4.4
Trade name	4,388		7,533			11,921			1,409		1,580		2,989		2,979		8,932			4.0
Customer relationships	17,000		22,869			39,869			7,046		3,808		10,854		9,954		29,015			5.8
Backlog	—		15,581			15,581			—		13,489		13,489		—		2,092			0.2
Total finite-lived intangible assets	73,588		136,484			210,072			48,036		35,427		83,463		25,552		126,608
IPR&D-addition (2)	—		12,400			12,400			—		—		—		—		12,400
Total intangible assets	73,588		148,884			222,472			48,036		35,427		83,463		25,552		139,008
IPR&D-disposal (2)	—		(12,400		)	(12,400		)	—		—		—		—		(12,400		)
Total intangible assets	$	73,588	$	136,484		$	210,072		$	48,036	$	35,427	$	83,463	$	25,552	$	126,608

(1)	Excludes fully amortized intangible assets.
(2)	In the fourth quarter of fiscal 2016, we recorded an impairment charge of $12.4 million relating to an in-process research and development intangible asset acquired as part of our acquisition of Cascade Microtech. See Note 7, Impairment of Long-lived Assets, to the Notes to Consolidated Financial Statements for further details.

Schedule of Indefinite-lived Intangible Assets

The changes in intangible assets for fiscal 2016 and the net book value of intangible assets at December 31, 2016 and December 26, 2015 were as follows (in thousands):

	Intangible Assets, Gross Amount								Accumulated Amortization						Intangible Assets, Net					Weight Average Useful Life
Other Intangible Assets (1)	December 26, 2015		Additions/Disposals			December 31, 2016			December 26, 2015		Expense, net		December 31, 2016		December 26, 2015		December 31, 2016			December 31, 2016
Existing developed technologies	$	52,200	$	90,501		$	142,701		$	39,581	$	16,550	$	56,131	$	12,619	$	86,569		4.4
Trade name	4,388		7,533			11,921			1,409		1,580		2,989		2,979		8,932			4.0
Customer relationships	17,000		22,869			39,869			7,046		3,808		10,854		9,954		29,015			5.8
Backlog	—		15,581			15,581			—		13,489		13,489		—		2,092			0.2
Total finite-lived intangible assets	73,588		136,484			210,072			48,036		35,427		83,463		25,552		126,608
IPR&D-addition (2)	—		12,400			12,400			—		—		—		—		12,400
Total intangible assets	73,588		148,884			222,472			48,036		35,427		83,463		25,552		139,008
IPR&D-disposal (2)	—		(12,400		)	(12,400		)	—		—		—		—		(12,400		)
Total intangible assets	$	73,588	$	136,484		$	210,072		$	48,036	$	35,427	$	83,463	$	25,552	$	126,608

(1)	Excludes fully amortized intangible assets.
(2)	In the fourth quarter of fiscal 2016, we recorded an impairment charge of $12.4 million relating to an in-process research and development intangible asset acquired as part of our acquisition of Cascade Microtech. See Note 7, Impairment of Long-lived Assets, to the Notes to Consolidated Financial Statements for further details.

Schedule of Remaining Estimated Amortization Expense

Based on the carrying value of the finite-lived intangible assets recorded as of December 31, 2016, and assuming no subsequent additions to or impairment of the underlying assets, the remaining estimated annual amortization expense is expected to be as follows (in thousands):

Fiscal Year	Amount
2017	$	30,672
2018	28,303
2019	25,639
2020	23,570
2021	12,915
and thereafter	5,509
Total	$	126,608

Schedule of Goodwill [Table Text Block]

The following table summarizes the changes in the carrying amount of goodwill, by reportable segments, for fiscal 2016, applying the segment changes as of June 24, 2016, which was the date when we acquired Cascade Microtech.

	Probe Cards		Systems			Total
	(in thousands)
Goodwill, gross, as of December 27, 2014 and December 26, 2015	$	30,731	$	—		$	30,731
Additions-Cascade Microtech	141,751		16,390			158,141
Foreign currency translation	—		(862		)	(862		)
Balance as of December 31, 2016	$	172,482	$	15,528		$	188,010