Goodwill and Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Goodwill By Business Segment

The components of the Company’s goodwill by an operating segment at September 30, 2016 and 2015 are as follows (in thousands): 

	Brooks Semiconductor Solutions Group			Brooks Life Science Systems		Other			Total
Gross goodwill, at September 30, 2014	$	651,067		$	47,378	$	26,014		$	724,459
Accumulated goodwill impairments	(588,944		)	—		(26,014		)	(614,958		)
Goodwill, net of accumulated impairments, at September 30, 2014	62,123			47,378		—			109,501
Acquisitions and adjustments	3,660			8,247		—			11,907
Gross goodwill, at September 30, 2015	654,727			55,625		26,014			736,366
Accumulated goodwill impairments	(588,944		)	—		(26,014		)	(614,958		)
Goodwill, net of accumulated impairments, at September 30, 2015	65,783			55,625		—			121,408
Acquisitions and adjustments	1,054			79,676		—			80,730
Gross goodwill, at September 30, 2016	655,781			135,301		26,014			817,096
Accumulated goodwill impairments	(588,944		)	—		(26,014		)	(614,958		)
Goodwill, net of accumulated impairments, at September 30, 2016	$	66,837		$	135,301	$	—		$	202,138

Components of Identifiable Intangible Assets

The components of the Company’s identifiable intangible assets as of September 30, 2016 and 2015 are as follows (in thousands):

	September 30, 2016						September 30, 2015
	Cost		Accumulated Amortization		Net Book Value		Cost		Accumulated Amortization		Net Book Value
Patents	$	7,808	$	7,486	$	322	$	7,808	$	7,394	$	414
Completed technology	60,485		51,018		9,467		60,748		46,718		14,030
Trademarks and trade names	9,142		4,204		4,938		4,241		3,604		637
Customer relationships	114,263		47,147		67,116		77,716		37,351		40,365
	$	191,698	$	109,855	$	81,843	$	150,513	$	95,067	$	55,446

Estimated Future Amortization Expense for Intangible Assets

Estimated future amortization expense for the intangible assets as of September 30, 2016 is as follows (in thousands):

Year ended September 30,
2017	$	15,573
2018	14,052
2019	13,713
2020	12,909
2021	8,036
Thereafter	17,560
	$	81,843