Pension and Post-Retirement Benefits (Components of Net Periodic Benefit Cost) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
United States Pension Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			$ 5,139,000	$ 0
Service cost	$ 1,335,000	$ 0	2,671,000	0
Interest cost	6,198,000	493,000	12,396,000	1,060,000
Expected return on plan assets	(9,976,000)	(658,000)	(19,952,000)	(1,460,000)
Amortization of net loss	298,000	337,000	595,000	640,000
Net periodic benefit cost (income)	(2,145,000)	172,000	(4,290,000)	240,000
Non-US Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer			514,000	0
Service cost	496,000	137,000	981,000	462,000
Interest cost	576,000	582,000	1,139,000	1,149,000
Expected return on plan assets	(151,000)	0	(304,000)	0
Amortization of net loss	153,000	0	304,000	0
Net periodic benefit cost (income)	1,074,000	719,000	2,120,000	1,611,000
United States Postretirement Benefit Plan of US Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	163,000	5,000	326,000	10,000
Interest cost	499,000	145,000	999,000	290,000
Amortization of net loss	15,000	32,000	30,000	63,000
Net periodic benefit cost (income)	677,000	182,000	1,355,000	363,000
Non-U.S. Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	13,000	0	27,000	0
Interest cost	32,000	0	65,000	0
Amortization of net loss	0	0	0	0
Net periodic benefit cost (income)	$ 45,000	$ 0	$ 92,000	$ 0