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Revenues from Contracts with Customers (Detail Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Change In Accounting Estimate [Line Items]    
Income before income taxes $ 116,631 $ 124,444
Diluted earnings per share $ 3.70 $ 3.67
EAC Adjustments    
Change In Accounting Estimate [Line Items]    
Income before income taxes $ 2,800 $ 7,800
Diluted earnings per share $ 0.09 $ 0.22