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Segment Information - Operations and Identifiable Assets (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($) customer segment	Sep. 30, 2018 USD ($) customer	Jun. 30, 2019 USD ($)
Operations and identifiable assets by industry segment
Number of identifiable industry segments | segment	3
Total revenues	$ 290,852	$ 266,249
Income (Loss) from Operations	24,887	$ 16,257
Segments assets	$ 1,290,102		$ 1,264,864
Revenue | Customer Concentration Risk
Operations and identifiable assets by industry segment
Number of major customers | customer	0	0
Servicio de Administaction Tributaria ("SAT") in Mexico | Revenue | Customer Concentration Risk
Operations and identifiable assets by industry segment
Concentration (as a percent)	10.00%	10.00%
Operating Segments | Security Division
Operations and identifiable assets by industry segment
Total revenues	$ 188,964	$ 169,960
Income (Loss) from Operations	20,318	23,050
Segments assets	803,388		793,810
Operating Segments | Healthcare Division
Operations and identifiable assets by industry segment
Total revenues	40,208	38,273
Income (Loss) from Operations	2,817	(1,875)
Segments assets	193,342		157,639
Operating Segments | Optoelectronics and Manufacturing Division
Operations and identifiable assets by industry segment
Total revenues	73,638	70,954
Income (Loss) from Operations	8,769	6,825
Segments assets	238,883		237,851
Corporate
Operations and identifiable assets by industry segment
Income (Loss) from Operations	(7,337)	(11,351)
Segments assets	97,202		79,498
Eliminations
Operations and identifiable assets by industry segment
Total revenues	(11,958)	(12,938)
Income (Loss) from Operations	320	$ (392)
Segments assets	$ (42,713)		$ (3,934)

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