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Debt (Tables)
9 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]  
Availability Under the Senior Credit Facility
Availability under the senior secured revolving credit facility at March 31, 2018 was as follows: 
 
March 31,
2018
 
June 30,
2017
 
(In thousands)
Senior secured revolving credit facility
$
300,000

 
$
300,000

Capacity constraint due to the Leverage Ratio
178,899

 
169,092

Capacity under the credit facility
121,101

 
130,908

Borrowings outstanding
9,304

 
44,682

Letters of credit
24,960

 
7,825

Availability under the senior secured revolving credit facility
$
86,837

 
$
78,401