Goodwill (Details) - USD ($)	3 Months Ended
	Sep. 30, 2017	Jul. 01, 2017
Changes in goodwill
Balance at the beginning of the period	$ 151,600,000
Goodwill - Trilithic	16,900,000
Currency translation adjustments	900,000
Balance at the end of the period	169,400,000	$ 151,600,000
Network Enablement
Changes in goodwill
Balance at the beginning of the period	143,300,000
Goodwill - Trilithic	16,900,000
Currency translation adjustments	900,000
Balance at the end of the period	161,100,000	143,300,000
Goodwill impairment		0
Optical Security and Performance Products
Changes in goodwill
Balance at the beginning of the period	8,300,000
Goodwill - Trilithic	0
Currency translation adjustments	0
Balance at the end of the period	$ 8,300,000	8,300,000
Goodwill impairment		$ 0