Pensions and Other Postretirement Benefit Plans (Schedule of Funded Status of Plans and Composition of Accrued Pension Cost) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Noncurrent asset	$ 10,400	$ 10,100
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	171,387	183,199	$ 168,390
Benefit obligation	199,856	213,110	$ 204,334
Funded status	(28,469)	(29,911)
Noncurrent asset	10,423	10,097
Current liability	(2,110)	(2,141)
Noncurrent liability	(36,782)	(37,867)
Net amount recognized	(28,469)	(29,911)
Net actuarial loss	69,896	71,623
Prior service cost/(credit)	608	753
Net amount recognized	$ 70,504	$ 72,376
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Benefit obligation	$ 59,970	$ 64,987	$ 61,108
Funded status	$ (59,970)	$ (64,987)
Noncurrent asset
Current liability	$ (4,660)	$ (4,750)
Noncurrent liability	(55,310)	(60,237)
Net amount recognized	(59,970)	(64,987)
Net actuarial loss	37,997	44,195
Prior service cost/(credit)	(35,387)	(39,875)
Net amount recognized	2,610	$ 4,320
U.S. Pension Plans with Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	(2,890)
U.S. Pension Plans without Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	(7,905)
United States Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	(10,795)
Non-U.S. Pension Plans with Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	6,097
Non-U.S. Pension Plans without Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	(23,771)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	(17,674)
Pension Plans with Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	3,207
Pension Plans without Pension Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized	$ (31,676)