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Liabilities for Dispositions and Discontinued Operations (Tables)
9 Months Ended
Sep. 30, 2011
Liabilities of Disposal Group, Including Discontinued Operation [Abstract] 
Schedule of Change in Environmental Loss Contingencies [Table Text Block]
An analysis of the liabilities for dispositions and discontinued operations follows:
 
 
September 30,
 
December 31,
 
 
2011
 
2010
 
Balance, beginning of period
$
93,160

 
$
98,591

 
Expenditures charged to liabilities
(6,915
)
 
(8,632
)
 
Increase to liabilities
58

 
3,201

 
Balance, end of period
86,303

 
93,160

 
Less: Current portion
(11,090
)
 
(11,500
)
 
Non-current portion
$
75,213

 
$
81,660