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Pension and Other Post-Retirement Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs
The Company’s net periodic benefit costs for its qualified defined benefit pension plans 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
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
 
2013
 
2012
Service cost
$
—

 
$
—

 
$
69

 
$
67

 
$
—

 
$
—

 
$
207

 
$
201

Interest cost
8,989

 
9,272

 
66

 
95

 
26,967

 
27,816

 
198

 
285

Expected return on plan assets
(11,498
)
 
(9,970
)
 
—

 
—

 
(34,494
)
 
(29,910
)
 
—

 
—

Amortization of prior service cost
—

 
—

 
(1,413
)
 
(1,388
)
 
—

 
—

 
(4,239
)
 
(4,164
)
Amortization of net (gain) loss
3,074

 
2,670

 
104

 
108

 
9,222

 
8,010

 
312

 
324

Net periodic benefit cost (benefit)
$
565

 
$
1,972

 
$
(1,174
)
 
$
(1,118
)
 
$
1,695

 
$
5,916

 
$
(3,522
)
 
$
(3,354
)