Capital Assets (Tables)

9 Months Ended

Jun. 30, 2018

Capital Assets [Abstract]

Property and Equipment

Property and equipment, net are as follows: 

	June 30, 2018			September 30, 2017
Land and improvements	$	2,866		$	2,867
Buildings and improvements	60,704			60,340
Machinery and equipment	203,293			196,621
Assets held under capital leases	2,886			2,747
Total property and equipment	269,749			262,575
Less: Accumulated depreciation	(175,408		)	(162,645		)
Total property and equipment, net	$	94,341		$	99,930

Goodwill

Changes to the carrying amount of goodwill are as follows:  

	Test		Sensors			Total
Balance, September 30, 2017	$	25,109	$	344,653		$	369,762
Currency translation	69		(16		)	53
Balance, June 30, 2018	$	25,178	$	344,637		$	369,815

Intangible Assets

Intangible assets are as follows: 

	June 30, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Weighted Average Useful Life (in Years)
Software development costs	$	28,445	$	(15,859	)	$	12,586	6.7
Technology and patents	46,777		(11,683		)	35,094		14.9
Trademarks and trade names	6,962		(2,916		)	4,046		25.6
Customer lists	156,960		(20,814		)	136,146		15.8
Land-use rights	2,382		(678		)	1,704		26.4
Trade names	57,500		—			57,500		Indefinite
Total intangible assets	$	299,026	$	(51,950	)	$	247,076	15.0

	September 30, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Weighted Average Useful Life (in Years)
Software development costs	$	26,083	$	(15,830	)	$	10,253	5.9
Technology and patents	46,731		(9,399		)	37,332		14.9
Trademarks and trade names	6,936		(2,484		)	4,452		25.6
Customer lists	157,016		(13,359		)	143,657		15.8
Land-use rights	2,377		(492		)	1,885		26.4
Trade names	57,500		—			57,500		Indefinite
Total intangible assets	$	296,643	$	(41,564	)	$	255,079	15.0

Amortization Expense

Amortization expense recognized is as follows:

	Three Months Ended				Nine Months Ended
	June 30, 2018		July 1, 2017		June 30, 2018		July 1, 2017
Amortization expense	$	3,453	$	3,656	$	10,388	$	10,984

Estimated Future Amortization Expense on Finite-Lived Intangible Assets

Estimated future amortization expense related to finite-lived intangible assets is as follows: 

	Amortization Expense
Remainder of 2018	$	3,422
2019	13,595
2020	13,314
2021	14,213
2022	14,929
2023	14,827
Thereafter	115,276