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Segment Information - Operations and Identifiable Assets (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($) customer	Jun. 30, 2018 USD ($)
Operations and identifiable assets by industry segment
Number of identifiable industry segments | segment	3
Total net revenues	$ 266,249	$ 257,133
Income (Loss) from Operations	16,257	$ 19,394
Segments assets	$ 1,327,928		$ 1,255,691
SAT in Mexico | Revenue | Customer Concentration Risk
Operations and identifiable assets by industry segment
Number of major customers | customer		1
Concentration (as a percent)	10.00%	13.00%
Operating Segments | Security Division
Operations and identifiable assets by industry segment
Total net revenues	$ 169,960	$ 162,245
Income (Loss) from Operations	23,050	22,693
Segments assets	824,528		804,527
Operating Segments | Healthcare Division
Operations and identifiable assets by industry segment
Total net revenues	38,273	45,529
Income (Loss) from Operations	(1,875)	847
Segments assets	167,913		167,611
Operating Segments | Optoelectronics and Manufacturing division
Operations and identifiable assets by industry segment
Total net revenues	70,954	58,926
Income (Loss) from Operations	6,825	5,175
Segments assets	245,287		220,373
Corporate
Operations and identifiable assets by industry segment
Income (Loss) from Operations	(11,351)	(8,753)
Segments assets	93,648		66,453
Intersegment Eliminations
Operations and identifiable assets by industry segment
Total net revenues	(12,938)	(9,567)
Income (Loss) from Operations	(392)	$ (568)
Segments assets	$ (3,448)		$ (3,273)

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