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Pension and Other Post-Retirement Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs
The Company’s net periodic benefit costs for its defined benefit pension plans and post-retirement healthcare plans for both continuing and discontinued operations are as follows (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
Pension Plans
 
Post-Retirement Healthcare Plan
 
Pension Plans
 
Post-Retirement Healthcare Plan
 
2014
 
2013
 
2014
 
2013
 
2014
 
2013
 
2014
 
2013
Service cost
$
—

 
$
—

 
$
60

 
$
69

 
$
—

 
$
—

 
$
120

 
$
138

Interest cost
9,879

 
8,989

 
71

 
66

 
19,758

 
17,978

 
142

 
132

Expected return on plan assets
(11,528
)
 
(11,498
)
 
—

 
—

 
(23,056
)
 
(22,996
)
 
—

 
—

Amortization of prior service cost
—

 
—

 
(872
)
 
(1,413
)
 
—

 
—

 
(1,744
)
 
(2,826
)
Amortization of net (gain) loss
—

 
3,074

 
80

 
104

 
(1
)
 
6,148

 
160

 
208

Net periodic benefit cost
$
(1,649
)
 
$
565

 
$
(661
)
 
$
(1,174
)
 
$
(3,299
)
 
$
1,130

 
$
(1,322
)
 
$
(2,348
)