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Pension And Other Post-Retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2017
Compensation and Retirement Disclosure [Abstract]  
Schedule Of Components Of Net Periodic Benefit Cost For Pension And Other Post-Retirement Benefit Programs
The components of net periodic benefit cost for the pension and other post-retirement benefit programs reflected in consolidated results are shown below:
 
Pension Benefits
 
Other Post-Retirement Benefits
 
Three Months Ended June 30,
 
Three Months Ended June 30,
(In Thousands)
2017
 
2016
 
2017
 
2016
Service cost
$
58

 
$
52

 
$
9

 
$
10

Interest cost
3,164

 
3,365

 
77

 
84

Expected return on plan assets
(3,737
)
 
(3,979
)
 
—

 
—

Amortization of prior service costs, gains or losses and net transition asset
3,122

 
3,384

 
(62
)
 
(47
)
Net periodic benefit cost
$
2,607

 
$
2,822

 
$
24

 
$
47

 
Pension Benefits
 
Other Post-Retirement Benefits
 
Six Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
Service cost
$
116

 
$
124

 
$
18

 
$
21

Interest cost
6,328

 
6,730

 
153

 
169

Expected return on plan assets
(7,473
)
 
(7,957
)
 
—

 
—

Amortization of prior service costs, (gains) losses and net transition asset
6,245

 
6,768

 
(123
)
 
(95
)
Net periodic benefit cost
$
5,216

 
$
5,665

 
$
48

 
$
95