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Employee Benefit Plans (Tables)
 9 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Net Periodic Benefit Cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Nine Months Ended

 

 

 

March 31, 

 

March 31, 

 

 

    

2016

    

2015

    

2016

    

2015

 

Components of net periodic benefit costs:

    

 

 

    

 

 

    

 

 

    

 

 

 

Service cost

 

$
924

 

$
673

 

$
2,865

 

$
2,569

 

Interest cost

 

 
4,837

 

 
3,578

 

 
15,419

 

 
16,987

 

Expected return on plan assets

 

 
(5,745)

 

 
(4,598)

 

 
(18,315)

 

 
(19,670)

 

Net periodic cost (benefit)

 

$
16

 

$
(347)

 

$
(31)

 

$
(114)