Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill were as follows ($000):

	Year Ended June 30, 2019
	Compound Semiconductors		Photonic Solutions		Total
Balance-beginning of period	$	161,008	$	109,670	$	270,678
Goodwill acquired	25,569		26,069		51,638
Foreign currency translation	(856)		(1,682)		(2,538)
Balance-end of period	$	185,721	$	134,057	$	319,778

	Year Ended June 30, 2018
	Compound Semiconductors		Photonic Solutions		Total
Balance-beginning of period	$	141,798	$	108,544	$	250,342
Goodwill acquired	18,956		—		18,956
Goodwill adjustment for prior year acquisition - IPI	—		407		407
Foreign currency translation	254		719		973
Balance-end of period	$	161,008	$	109,670	$	270,678

Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill

The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of June 30, 2019 and 2018 were as follows ($000):

	June 30, 2019						June 30, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Technology and Patents	$	91,637	$	(39,679)	$	51,958	$	66,812	$	(32,979)	$	33,833
Trade Names	15,759		(1,601)		14,158		15,882		(1,471)		14,411
Customer Lists	132,872		(59,664)		73,208		127,603		(50,792)		76,811
Other	1,572		(1,572)		—		1,573		(1,559)		14
Total	$	241,840	$	(102,516)	$	139,324	$	211,870	$	(86,801)	$	125,069

Estimated Amortization Expense for Existing Intangible Assets for Each of Five Succeeding Years

The estimated amortization expense for existing intangible assets for each of the five succeeding years is as follows $0:

Year Ending June 30,
2020	$	16,700
2021	16,300
2022	14,800
2023	14,400
2024	14,000