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Other Liabilities - Additional Information (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Other liabilities    
Employee compensation and benefits $ 19,257 $ 19,756
Liability for pension benefits 62,836 62,020
Liabilities for uncertain tax positions 10,983 10,670
Other 17,001 14,826
Other liabilities (less current portion) $ 110,077 $ 107,272