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Leases
12 Months Ended
Dec. 31, 2011
Leases [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Leases
The Company leases certain equipment and plant facilities under non-cancelable operating leases. Rental expense for the Company totaled approximately $18.9 million in 2011, $14.8 million in 2010 and $14.1 million in 2009.
Minimum payments for operating leases having initial or remaining non-cancelable lease terms in excess of one year at December 31, 2011, including approximately $2.4 million annually related to discontinued operations, are summarized below:
Year ended December 31,
 
(dollars in
thousands)
2012
 
$
19,590

2013
 
18,580

2014
 
16,410

2015
 
13,870

2016
 
12,350

Thereafter
 
47,080

Total
 
$
127,880