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Liabilities for Dispositions and Discontinued Operations (Tables)
 6 Months Ended
Jun. 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:
 
 
June 30,
 
December 31,
 
 
2011
 
2010
 
Balance, beginning of period
$
93,160


 
$
98,591


 
Expenditures charged to liabilities
(4,916
)
 
(8,632
)
 
Increase to liabilities
309


 
3,201


 
Balance, end of period
88,553


 
93,160


 
Less: Current portion
(11,625
)
 
(11,500
)
 
Non-current portion
$
76,928


 
$
81,660