Accumulated Other Comprehensive Income/(Loss) (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 509,869
Ending balance	473,960
Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(55,240)	$ (138)
Other comprehensive income/(loss) before reclassifications	(44,316)	(30,703)
Net current period other comprehensive income/(loss)	(44,316)	(30,703)
Ending balance	(99,556)	(30,841)
Pension and Postretirement Liability Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(51,666)	(48,383)
Other comprehensive income/(loss) before reclassifications	1,735	998
Amounts reclassified to the Statement of Income, net of tax	714	421
Net current period other comprehensive income/(loss)	2,449	1,419
Ending balance	(49,217)	(46,964)
Derivative Valuation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(861)	(977)
Other comprehensive income/(loss) before reclassifications	(2,374)	(530)
Amounts reclassified to the Statement of Income, net of tax	939	873
Net current period other comprehensive income/(loss)	(1,435)	343
Ending balance	(2,296)	(634)
Accumulated Items of Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(107,767)	(49,498)
Other comprehensive income/(loss) before reclassifications	(44,955)	(30,235)
Net current period other comprehensive income/(loss)	(43,302)	(28,941)
Ending balance	$ (151,069)	$ (78,439)