Accumulated Other Comprehensive Income (Loss) (Schedule of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		$ (134,005)	$ (71,374)	$ (138,447)	$ (73,160)
Other comprehensive income (loss)		(4,965)	(8,692)	(8,667)	(8,267)
Currency impact		709	933	3,122	1,243
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	[1]	2,352	1,333	7,084	4,013
Amortization of prior service cost (1)	[1]	77	355	231	1,069
Cost of sales		507	58	1,666	(756)
Current-period other comprehensive income (loss)		(1,320)	(6,013)	3,436	(2,698)
Tax effect		(418)	(233)	(732)	(1,762)
Ending balance		(135,743)	(77,620)	(135,743)	(77,620)
Foreign Currency Translation [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(17,471)	3,181	(9,162)	4,554
Other comprehensive income (loss)		(1,265)	(8,022)	(9,574)	(9,395)
Amounts reclassified from accumulated other comprehensive income (loss):
Current-period other comprehensive income (loss)		(1,265)	(8,022)	(9,574)	(9,395)
Tax effect		0	0	0	0
Ending balance		(18,736)	(4,841)	(18,736)	(4,841)
Derivative Instruments [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(295)	947	(625)	1,221
Other comprehensive income (loss)		(3,700)	(670)	(4,487)	(164)
Amounts reclassified from accumulated other comprehensive income (loss):
Cost of sales		507	58	1,666	(756)
Current-period other comprehensive income (loss)		(3,193)	(612)	(2,821)	(920)
Tax effect		(19)	87	(61)	121
Ending balance		(3,507)	422	(3,507)	422
Pension and Other Postretirement Benefits [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(116,239)	(75,502)	(128,660)	(78,935)
Other comprehensive income (loss)		0	0	5,394	1,292
Currency impact		709	933	3,122	1,243
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	[1]	2,352	1,333	7,084	4,013
Amortization of prior service cost (1)	[1]	77	355	231	1,069
Current-period other comprehensive income (loss)		3,138	2,621	15,831	7,617
Tax effect		(399)	(320)	(671)	(1,883)
Ending balance		$ (113,500)	$ (73,201)	$ (113,500)	$ (73,201)

[1] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost within the cost of sales and selling, general and administrative expenses on the Condensed Consolidated Statements of Operations.