Other Liabilities - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other liabilities
Employee compensation and benefits	$ 16,808	$ 15,914
Liability for pension benefits	221,965	136,429
Liabilities for uncertain tax positions	3,492	6,741
Other	25,302	10,087
Other liabilities (less current portion)	$ 267,567	$ 169,171