Comprehensive Income (Loss) (Schedule of AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	$ (73,160)		$ (141,040)
Other comprehensive income (loss)	42		(1,958)
Currency impact	13		(352)
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	1,567	[1]	2,600	[1]
Amortization of prior service cost (1)	357	[1]	390	[1]
Cost of sales	(465)		246
Current-period other comprehensive income (loss)	1,514		926
Tax effect	(615)		(135)
Ending balance	(72,261)		(140,249)
Foreign Currency Translation [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	4,554		(1,641)
Other comprehensive income (loss)	(588)		(2,925)
Amounts reclassified from accumulated other comprehensive income (loss):
Current-period other comprehensive income (loss)	(588)		(2,925)
Tax effect	0		0
Ending balance	3,966		(4,566)
Derivative Instruments [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	1,221		489
Other comprehensive income (loss)	630		967
Amounts reclassified from accumulated other comprehensive income (loss):
Cost of sales	(465)		246
Current-period other comprehensive income (loss)	165		1,213
Tax effect	(27)		(168)
Ending balance	1,359		1,534
Pension and Other Postretirement Benefits [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(78,935)		(139,888)
Other comprehensive income (loss)	0		0
Currency impact	13		(352)
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	1,567	[1]	2,600	[1]
Amortization of prior service cost (1)	357	[1]	390	[1]
Current-period other comprehensive income (loss)	1,937		2,638
Tax effect	(588)		33
Ending balance	$ (77,586)		$ (137,217)

[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.