CAPITAL ASSETS

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

Assets held under capital leases, consisting of machinery and equipment, are recorded at the present value of minimum lease payments and are amortized on a straight-line basis over the estimated life of the asset or the lease term. Amortization of assets held as capital leases is included in depreciation expense in the Consolidated Statements of Income.

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 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 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

Future amortization amounts presented above are estimates. Actual future amortization expense may be different due to fluctuations in foreign currency exchange rates, future acquisitions, impairments, changes in amortization periods or other factors.