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Components of Quarterly and Year-to-Date Net Periodic Benefit Costs (Tables)
6 Months Ended
Jun. 30, 2012
Components of Quarterly and Year-to-Date Net Periodic Benefit Costs [Abstract]  
Components of net periodic benefit costs

 
Six Months Ended
 
 
Three Months Ended
 
 
June 30,
 
 
June 30,
 
 
June 30,
 
 
June 30,
 
 
2012
 
 
2011
 
 
2012
 
 
2011
 
Qualified Pension
 
 
 
 
 
 
 
 
 
 
 
 
Service cost, benefits earned during the period
 
$
646,702
 
 
$
518,268
 
 
$
323,351
 
 
$
259,134
 
Interest cost on projected benefit obligation
 
 
812,220
 
 
 
785,912
 
 
 
406,110
 
 
 
392,956
 
Expected return on plan assets
 
 
(1,326,986
)
 
 
(1,171,346
)
 
 
(663,493
)
 
 
(585,673
)
Amortization of unrecognized transition obligation
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
Amortization of unrecognized prior service cost
 
 
6,928
 
 
 
14,940
 
 
 
3,464
 
 
 
7,470
 
Amortization of unrecognized net loss
 
 
661,136
 
 
 
338,226
 
 
 
330,568
 
 
 
169,113
 
  Net periodic pension expense
 
$
800,000
 
 
$
486,000
 
 
$
400,000
 
 
$
243,000
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Supplemental Pension
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost, benefits earned during the period
 
$
17,384
 
 
$
15,312
 
 
$
8,692
 
 
$
7,656
 
Interest cost on projected benefit obligation
 
 
25,546
 
 
 
26,887
 
 
 
12,773
 
 
 
13,443
 
Expected return on plan assets
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
Amortization of unrecognized prior service cost
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
Amortization of unrecognized net loss
 
 
9,960
 
 
 
4,732
 
 
 
4,980
 
 
 
2,366
 
  Net periodic supplemental pension expense
 
$
52,890
 
 
$
46,931
 
 
$
26,445
 
 
$
23,465
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Postretirement, Medical and Life
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost, benefits earned during the period
 
$
17,500
 
 
$
16,500
 
 
$
8,750
 
 
$
8,250
 
Interest cost on projected benefit obligation
 
 
36,000
 
 
 
37,500
 
 
 
18,000
 
 
 
18,750
 
Expected return on plan assets
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
Amortization of unrecognized prior service cost
 
 
(48,500
)
 
 
(48,500
)
 
 
(24,250
)
 
 
(24,250
)
Amortization of unrecognized net gain
 
 
-
 
 
 
-
 
 
 
-
 
 
 
-
 
  Net periodic postretirement, medical and life expense
 
$
5,000
 
 
$
5,500
 
 
$
2,500
 
 
$
2,750