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Retirement Plans (Tables)
 3 Months Ended
Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans
 
 
Pension benefits
 
Supplemental
retirement
benefits
 
Postretirement
benefits
(In thousands)
 
Three Months Ended March 31,
 
2015
 
2014
 
2015
 
2014
 
2015
 
2014
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
—


$
—

 
$
—

 
$
—

 
$
8

 
$
8

Interest cost
 
1,783


1,880

 
101


113

 
10

 
12

Expected return on plan assets
 
(3,090
)

(3,326
)
 
 
 
 
 
 
 
 
Amortization of prior service cost
 
 
 
 
 



13

 


 


Amortization of net actuarial (gain) loss
 
1,574


797

 
31


5

 
(13
)
 
(18
)
Net periodic benefit cost (credit)
 
$
267

 
$
(649
)
 
$
132

 
$
131

 
$
5

 
$
2