Comprehensive Income (Loss) (Schedule of AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	$ (71,374)		$ (132,011)		$ (73,160)		$ (141,040)
Other comprehensive income (loss)	(8,692)		5,210		(8,267)		8,269
Currency impact	933		(33)		1,243		(108)
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	1,333	[1]	2,532	[1]	4,013	[1]	7,764	[1]
Amortization of prior service cost (1)	355	[1]	393	[1]	1,069	[1]	1,171	[1]
Cost of sales	58		(26)		(756)		(32)
Current-period other comprehensive income (loss)	(6,013)		8,076		(2,698)		17,064
Tax effect	(233)		2		(1,762)		43
Ending balance	(77,620)		(123,933)		(77,620)		(123,933)
Foreign Currency Translation [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	3,181		(2,231)		4,554		(1,641)
Other comprehensive income (loss)	(8,022)		4,528		(9,395)		3,938
Amounts reclassified from accumulated other comprehensive income (loss):
Current-period other comprehensive income (loss)	(8,022)		4,528		(9,395)		3,938
Tax effect	0		0		0		0
Ending balance	(4,841)		2,297		(4,841)		2,297
Derivative Instruments [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	947		1,025		1,221		489
Other comprehensive income (loss)	(670)		(78)		(164)		512
Amounts reclassified from accumulated other comprehensive income (loss):
Cost of sales	58		(26)		(756)		(32)
Current-period other comprehensive income (loss)	(612)		(104)		(920)		480
Tax effect	87		77		121		29
Ending balance	422		998		422		998
Pension and Other Postretirement Benefits [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(75,502)		(130,805)		(78,935)		(139,888)
Other comprehensive income (loss)	0		760		1,292		3,819
Currency impact	933		(33)		1,243		(108)
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	1,333	[1]	2,532	[1]	4,013	[1]	7,764	[1]
Amortization of prior service cost (1)	355	[1]	393	[1]	1,069	[1]	1,171	[1]
Current-period other comprehensive income (loss)	2,621		3,652		7,617		12,646
Tax effect	(320)		(75)		(1,883)		14
Ending balance	$ (73,201)		$ (127,228)		$ (73,201)		$ (127,228)

[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.