Capital Assets (Tables)

6 Months Ended

Mar. 31, 2018

Capital Assets [Abstract]

Property and Equipment

Property and equipment, net are as follows: 

	March 31, 2018			September 30, 2017
Land and improvements	$	2,869		$	2,867
Buildings and improvements	61,793			60,340
Machinery and equipment	201,351			196,621
Assets held under capital leases	2,815			2,747
Total property and equipment	268,828			262,575
Less: Accumulated depreciation	(173,255		)	(162,645		)
Total property and equipment, net	$	95,573		$	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	715		36		751
Balance, March 31, 2018	$	25,824	$	344,689	$	370,513

Intangible Assets

Intangible assets are as follows: 

	March 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Weighted Average Useful Life (in Years)
Software development costs	$	27,999	$	(15,859	)	$	12,140	5.9
Technology and patents	47,218		(11,212		)	36,006		14.9
Trademarks and trade names	7,208		(2,852		)	4,356		25.7
Customer lists	157,000		(18,342		)	138,658		15.8
Land-use rights	2,437		(627		)	1,810		26.9
Trade names	57,500		—			57,500		Indefinite
Total intangible assets	$	299,362	$	(48,892	)	$	250,470	14.9

	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				Six Months Ended
	March 31, 2018		April 1, 2017		March 31, 2018		April 1, 2017
Amortization expense	$	3,456	$	3,663	$	6,935	$	7,328

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	$	8,042
2019	15,989
2020	15,708
2021	15,708
2022	15,524
2023	14,240
Thereafter	107,759