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Valuation and Qualifying Accounts Valuation and Qualifying Accounts (Tables)
12 Months Ended
Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]  
Summary of Valuation Allowance [Table Text Block]
Description
 
Balance at beginning of period
 
Other adjustments    
 
Additions charged to costs and expenses
 
Balance at end of period Noncurrent
 
 
(in thousands)
 Year ended December 31, 2011:
 
 
 
 
 
 
 
 
Deferred tax assets valuation allowance
 
$
24,600

 
$
(3,165
)
 
$
8,518

 
$
29,953

 Year ended December 31, 2010:
 
 
 
 
 
 
 
 
Deferred tax assets valuation allowance
 
$
22,425

 
$
(1,020
)
 
$
3,195

 
$
24,600