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Miscellaneous Income, Net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
MiscellaneousIncome [Abstract]    
Contract settlement $ 2,908 $ 0
Gains on sales of operating property and equipment 1,304 273
Foreign currency translation benefit (1) 0 1,904
Rabbi trust investment income 500 1,459
Other, net 670 934
Other Nonoperating Income (Expense) $ 5,382 $ 4,570