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Income Taxes Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Computed expected tax expense 21.00% 21.00% 21.00%  
Deferred Tax Assets, Valuation Allowance $ 270 $ 473    
Income Taxes Paid 80,220 63,692 $ 62,005  
Unrecognized Tax Benefits 8,762 10,112 10,495 $ 10,227
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 8,119 9,434    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 1,180 1,565    
Income Tax penalties and interest expense (or benefits) included in income tax provision (310) $ 38 $ 128  
Internal Revenue Service (IRS) [Member]        
Operating Loss Carryforwards 4,093      
Tax Credit Carryforward, Amount 192      
State and Local Jurisdiction [Member]        
Operating Loss Carryforwards 523      
Tax Credit Carryforward, Amount 1,667      
Minimum [Member]        
Expiration of statutes of limitations impact on UTB balance 3,500      
Maximum [Member]        
Expiration of statutes of limitations impact on UTB balance $ 4,500