Other Liabilities - Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Pension and post employment benefits	$ 71,734	$ 81,012
Deferred compensation	40,284	41,096
Uncertain tax positions	80,122	69,898
Other	39,855	42,423
Other liabilities (less current portion)	$ 231,995	$ 234,429