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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2013
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
 
Pension benefits
 
Supplemental
retirement
benefits
 
Postretirement
benefits
(In thousands)
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
 
$
—


$
(3
)
 
$
—

 
$
—

 
$
8

 
$
9

 
$
—

 
$
22

 
$
—

 
$
—

 
$
24

 
$
27

Interest cost
 
1,721


1,885

 
101


115

 
10

 
12

 
5,164

 
5,669

 
303

 
345

 
31

 
35

Expected return on plan assets
 
(3,027
)

(2,827
)
 
 
 
 
 
 
 
 
 
(9,082
)
 
(8,481
)
 
 
 
 
 
 
 
 
Amortization of prior service
cost (credit)
 
 
 
 
 
31


31

 
(37
)
 
(61
)
 
 
 
 
 
93

 
93

 
(113
)
 
(183
)
Amortization of net actuarial
(gain) loss
 
2,033


2,198

 
17


(28
)
 
(19
)
 
(22
)
 
6,099

 
6,889

 
52

 
(85
)
 
(56
)
 
(65
)
Net periodic benefit cost (credit)
 
$
727

 
$
1,253

 
$
149

 
$
118

 
$
(38
)
 
$
(62
)
 
$
2,181

 
$
4,099

 
$
448

 
$
353

 
$
(114
)
 
$
(186
)