Other Liabilities - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other liabilities
Employee compensation and benefits	$ 18,536	$ 16,808
Liability for pension benefits	221,110	221,965
Liabilities for uncertain tax positions	3,445	3,492
Other	21,067	25,302
Other liabilities (less current portion)	$ 264,158	$ 267,567