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Basis of Presentation (Details 2) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Accumulated balances of items included in accumulated other comprehensive loss:    
Increase in pension liability $ (26,889) $ (26,889)
Income tax benefit (10,487) (10,487)
Accumulated other comprehensive loss $ (16,402) $ (16,402)