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Retirement Benefit Plans
 6 Months Ended
Dec. 31, 2016
Retirement Benefit Plans  
Retirement Benefit Plans

8. Retirement Benefit Plans

 

The Company sponsors various retirement benefit plans including qualified and nonqualified defined benefit pension plans for its employees. The components of net periodic pension expense are as follows (in thousands):

 

 

 

Three Months Ended
December 31,

 

Six Months Ended
December 31,

 

 

 

2015

 

2016

 

2015

 

2016

 

Service cost

 

$
212 

 

$
224 

 

$
425 

 

$
448 

 

Interest cost

 
8 

 
7 

 
17 

 
14 

 

Amortization of prior service cost

 
105 

 
70 

 
210 

 
140 

 

 

 

 

 

 

 

 

 

 

 

Net periodic pension expense

 

$
325 

 

$
301 

 

$
652 

 

$
602 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For the three months ended December 31, 2015 and 2016, the Company made contributions of $0.2 million and $1.0 million, respectively, to these defined benefit plans. For the six months ended December 31, 2015 and 2016, the Company made contributions of $0.2 million and $1.0 million, respectively, to these defined benefit plans.

 

In addition, the Company maintains various defined contribution plans. For the three months ended December 31, 2015 and 2016, the Company made contributions of $1.2 million and $1.0 million, respectively, to these defined contribution plans. For the six months ended December 31, 2015 and 2016, the Company made contributions of $2.3 million and $2.2 million, respectively, to these defined contribution plans.