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Debt (Tables)
 12 Months Ended
Jun. 30, 2017
Debt Disclosure [Abstract]  
Availability under the senior credit facility
 
 
June 30,
2017
 
June 30,
2016
 
 
(In thousands)
Senior revolving credit facility
 
$
300,000

 
$
200,000

Capacity constraint due to the Leverage Ratio
 
169,092

 
20,138

Capacity under the senior revolving credit facility
 
130,908

 
179,862

Letters of credit issued
 
7,825

 
20,755

Borrowings outstanding
 
44,682

 
—

Availability under the senior revolving credit facility
 
$
78,401

 
$
159,107