Goodwill and Intangible Assets (Tables)

9 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carry Amount of Goodwill

The changes in the carrying amount of goodwill are as follows:

	Aircraft Controls			Space and Defense Controls			Industrial Systems			Total
Balance at September 30, 2017	$	181,375		$	259,951		$	332,942		$	774,268
Acquisitions	—			3,769			17,541			21,310
Foreign currency translation	(780		)	(96		)	(3,876		)	(4,752		)
Balance at June 30, 2018	$	180,595		$	263,624		$	346,607		$	790,826

Components of Intangible Assets

The components of intangible assets are as follows:

		June 30, 2018					September 30, 2017
	Weighted- Average Life (years)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Customer-related	11	$	148,558	$	(97,083	)	$	175,872	$	(128,019	)
Technology-related	10	72,722		(50,766		)	71,924		(55,069		)
Program-related	19	65,676		(33,168		)	66,458		(30,675		)
Marketing-related	8	24,945		(18,842		)	26,552		(19,251		)
Other	10	4,333		(3,537		)	4,379		(3,353		)
Intangible assets	12	$	316,234	$	(203,396	)	$	345,185	$	(236,367	)