Accumulated Other Comprehensive Income/(Loss) (Schedule of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 509,869
Ending balance	488,107
Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(55,240)	$ (138)
Other comprehensive income/(loss) before reclassifications	(26,023)	(1,838)
Net current period other comprehensive income/(loss)	(26,023)	(1,838)
Ending balance	(81,263)	(1,976)
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	1,125	(102)
Amounts reclassified to the Statement of Income, net of tax	485	280
Net current period other comprehensive income/(loss)	1,610	178
Ending balance	(50,056)	(48,205)
Derivative Valuation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(861)	(977)
Other comprehensive income/(loss) before reclassifications	(744)	(802)
Amounts reclassified to the Statement of Income, net of tax	581	580
Net current period other comprehensive income/(loss)	(163)	(222)
Ending balance	(1,024)	(1,199)
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	(25,642)	(2,742)
Net current period other comprehensive income/(loss)	(24,576)	(1,882)
Ending balance	$ (132,343)	$ (51,380)