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Other Expense, Other Income and Non-Operating Other Income, net (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Other expense:    
Total other expense $ 167 $ 62
Other Operating Income:    
Settlements of litigation and potential litigation   747
Miscellaneous Income, Operating 236 125
Total other income 236 872
Non-operating other income, net:    
Interest income 24 24
Miscellaneous expense, Non-Operating (19) (17)
Total non-operating other income, net $ 5 $ 7