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Pension Plan (Tables)
 9 Months Ended
Sep. 30, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Components Of Net Periodic Benefit Expense
The following table shows the components of net periodic benefit income:

 
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
(In thousands)
 
2016
 
2015
 
2016
 
2015
Service cost
 
$
1,264

 
$
1,342

 
$
3,792

 
$
4,026

Interest cost
 
1,217

 
1,174

 
3,651

 
3,522

Expected return on plan assets
 
(2,737
)
 
(2,855
)
 
(8,211
)
 
(8,565
)
Amortization of prior service cost
 
—

 
4

 
—

 
12

Recognized net actuarial loss
 
193

 
159

 
579

 
477

Net periodic benefit income
 
$
(63
)
 
$
(176
)
 
$
(189
)
 
$
(528
)