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Pension and Other Post-Retirement Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2012
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs
The Company's net periodic benefit costs for its qualified defined benefit pension and post-retirement healthcare plans for both continuing and discontinued operations are as follows (in thousands):
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
Pension Plans
 
Post-Retirement Healthcare Plan
 
Pension Plans
 
Post-Retirement Healthcare Plan
 
2012
 
2011
 
2012
 
2011
 
2012
 
2011
 
2012
 
2011
Service cost
$
—

 
$
—

 
$
67

 
$
62

 
$
—

 
$
—

 
$
201

 
$
186

Interest cost
9,272

 
9,290

 
95

 
97

 
27,816

 
27,871

 
285

 
291

Expected return on plan assets
(9,970
)
 
(9,757
)
 
—

 
—

 
(29,910
)
 
(29,271
)
 
—

 
—

Amortization of prior service cost
—

 
—

 
(1,388
)
 
(1,388
)
 
—

 
—

 
(4,164
)
 
(4,164
)
Amortization of net loss
2,670

 
675

 
108

 
132

 
8,010

 
2,025

 
324

 
396

Net periodic benefit cost
$
1,972

 
$
208

 
$
(1,118
)
 
$
(1,097
)
 
$
5,916

 
$
625

 
$
(3,354
)
 
$
(3,291
)