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Debt (Tables)
12 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Availability under the senior credit facility
June 30,
2020
June 30,
2019
 (In thousands)
Senior secured revolving credit facility$300,000 $300,000 
Capacity constraint due to the Leverage Ratio 162,864 94,323 
Capacity under the senior secured revolving credit facility137,136 205,677 
Letters of credit34,529 48,147 
Borrowings outstanding9,208 5,347 
Availability under the senior secured revolving credit facility$93,399 $152,183