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Equity Level 3 Equity (Tables)
 12 Months Ended
Dec. 31, 2012
Stockholders' Equity Note [Abstract]  
Accumulated Other Comprehensive Loss [Table Text Block]
Changes in accumulated other comprehensive loss are as follows:

 
 
Accumulated Other Comprehensive Loss
 
 
(thousands)
Balance at December 31, 2010, net of taxes
 
$
(40,195
)
     Defined benefit pension plans, current-period other comprehensive loss
 
(80,650
)
Balance at December 31, 2011, net of taxes
 
(120,845
)
     Defined benefit pension plans, current-period other comprehensive loss
 
(384
)
Balance at December 31, 2012, net of taxes
 
$
(121,229
)