Pensions and Other Benefit Programs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 30	$ 32
Interest cost	17,244	18,830
Expected return on plan assets	(24,548)	(25,589)
Amortization of transition credit	0	0
Amortization of prior service (credit) cost	(15)	(15)
Amortization of net actuarial loss	7,268	6,706
Settlement	0	1,098
Net periodic benefit cost (income)	(21)	1,062
Foreign
Defined Benefit Plan Disclosure [Line Items]
Service cost	542	527
Interest cost	4,544	5,661
Expected return on plan assets	(7,780)	(8,472)
Amortization of transition credit	(2)	(2)
Amortization of prior service (credit) cost	(18)	(17)
Amortization of net actuarial loss	2,034	1,343
Settlement	0	0
Net periodic benefit cost (income)	(680)	(960)
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	419	501
Interest cost	1,771	2,136
Expected return on plan assets	0	0
Amortization of transition credit	0	0
Amortization of prior service (credit) cost	74	74
Amortization of net actuarial loss	884	1,360
Settlement	0	0
Net periodic benefit cost (income)	$ 3,148	$ 4,071