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Pension and Other Postretirement Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2012
Pension and Other Postretirement Benefit Plans [Abstract]  
Components of net periodic benefit cost
Components of net periodic benefit cost for the three and six months ended June 30:

 
For The Three Months
Ended June 30,
 
 
For The Six Months
Ended June 30,
 
 
Pension Benefits
 
 
Other Benefits
 
 
Pension Benefits
 
 
Other Benefits
 
(In thousands)
 
2012
 
 
2011
 
 
2012
 
 
2011
 
 
2012
 
 
2011
 
 
2012
 
 
2011
 
Service cost-benefits earned during the period
 
$
511
 
 
$
385
 
 
$
113
 
 
$
130
 
 
$
1,028
 
 
$
769
 
 
$
228
 
 
$
259
 
Interest cost on projected benefit obligation
 
 
2,806
 
 
 
3,015
 
 
 
971
 
 
 
1,079
 
 
 
5,637
 
 
 
6,020
 
 
 
1,945
 
 
 
2,157
 
Expected return on plan assets
 
 
(2,957
)
 
 
(3,247
)
 
 
-
 
 
 
-
 
 
 
(5,945
)
 
 
(6,482
)
 
 
-
 
 
 
-
 
Amortization of net transition (asset) obligation
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
Amortization of prior service (credit) cost
 
 
11
 
 
 
11
 
 
 
-
 
 
 
-
 
 
 
22
 
 
 
22
 
 
 
-
 
 
 
-
 
Amortization of (gain)/loss
 
 
266
 
 
 
-
 
 
 
(8
)
 
 
-
 
 
 
536
 
 
 
-
 
 
 
(16
)
 
 
-
 
Total benefits cost charged to income
 
$
637
 
 
$
164
 
 
$
1,076
 
 
$
1,209
 
 
$
1,278
 
 
$
329
 
 
$
2,157
 
 
$
2,416