Pension and Other Postretirement Benefits (Details 1) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Contribution expense		$ 5,907	$ 5,347	$ 5,213
Pension lump-sum settlement charge		0	9,856	0
Defined benefit pension plans, U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefits Paid	$ 27,986	26,497	52,490
Pension lump-sum settlement charge		0	0
Defined benefit pension plans, U.S. [Member] | Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension lump-sum settlement charge			9,856
Retirement Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contribution expense		$ 3,660	$ 3,666	$ 3,278
Annual Retirement Contribution Percent		4.00%