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Other Liabilities - Additional Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Other liabilities    
Employee compensation and benefits $ 19,524 $ 18,356
Liability for pension benefits 234,330 232,788
Liabilities for uncertain tax positions 2,479 2,416
Other 16,350 20,393
Other liabilities (less current portion) $ 272,683 $ 273,953