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Segment Information - Operations and Identifiable Assets (Details)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
customer
Mar. 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
customer
segment
Mar. 31, 2022
USD ($)
customer
Jun. 30, 2022
USD ($)
customer
Operations and identifiable assets by industry segment          
Number of identifiable industry segments | segment     3    
Total revenues $ 302,889 $ 290,477 $ 866,557 $ 846,415  
Income (loss) from operations 34,337 $ 28,426 78,128 $ 82,192  
Segments assets $ 1,483,303   $ 1,483,303   $ 1,443,150
Number of major customers | customer 1   0 0 0
One customer | Accounts receivable | Customer          
Operations and identifiable assets by industry segment          
Concentration (as a percent)     10.00%   10.00%
International customers | Revenues | Customer          
Operations and identifiable assets by industry segment          
Concentration (as a percent) 13.00% 10.00%   10.00%  
Operating segments | Security division          
Operations and identifiable assets by industry segment          
Total revenues $ 178,752 $ 158,644 $ 491,188 $ 454,079  
Income (loss) from operations 29,496 20,559 66,014 60,323  
Segments assets 877,618   877,618   $ 839,769
Operating segments | Healthcare division          
Operations and identifiable assets by industry segment          
Total revenues 43,911 52,178 130,994 155,191  
Income (loss) from operations 1,787 7,480 4,819 20,430  
Segments assets 244,825   244,825   231,423
Operating segments | Optoelectronics And Manufacturing Division          
Operations and identifiable assets by industry segment          
Total revenues 93,888 92,122 286,513 275,917  
Income (loss) from operations 12,493 11,177 35,963 34,342  
Segments assets 310,851   310,851   301,483
Corporate          
Operations and identifiable assets by industry segment          
Income (loss) from operations (10,148) (10,729) (29,572) (32,855)  
Segments assets 94,428   94,428   104,834
Intersegment revenue eliminations          
Operations and identifiable assets by industry segment          
Total revenues (13,662) (12,467) (42,138) (38,772)  
Income (loss) from operations 709 $ (61) 904 $ (48)  
Segments assets $ (44,419)   $ (44,419)   $ (34,359)