Comprehensive Income (Loss) (Schedule of AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	$ (72,261)		$ (140,249)		$ (73,160)		$ (141,040)
Other comprehensive income (loss)	383		5,017		425		3,059
Currency impact	297		307		310		(45)
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	1,113	[1]	2,600	[1]	2,680	[1]	5,200	[1]
Amortization of prior service cost (1)	357	[1]	390	[1]	714	[1]	780	[1]
Cost of sales	(349)		(252)		(814)		(6)
Current-period other comprehensive income (loss)	1,801		8,062		3,315		8,988
Tax effect	(914)		176		(1,529)		41
Ending balance	(71,374)		(132,011)		(71,374)		(132,011)
Foreign Currency Translation [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	3,966		(4,566)		4,554		(1,641)
Other comprehensive income (loss)	(785)		2,335		(1,373)		(590)
Amounts reclassified from accumulated other comprehensive income (loss):
Current-period other comprehensive income (loss)	(785)		2,335		(1,373)		(590)
Tax effect	0		0		0		0
Ending balance	3,181		(2,231)		3,181		(2,231)
Derivative Instruments [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	1,359		1,534		1,221		489
Other comprehensive income (loss)	(124)		(377)		506		590
Amounts reclassified from accumulated other comprehensive income (loss):
Cost of sales	(349)		(252)		(814)		(6)
Current-period other comprehensive income (loss)	(473)		(629)		(308)		584
Tax effect	61		120		34		(48)
Ending balance	947		1,025		947		1,025
Pension and Other Postretirement Benefits [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(77,586)		(137,217)		(78,935)		(139,888)
Other comprehensive income (loss)	1,292		3,059		1,292		3,059
Currency impact	297		307		310		(45)
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	1,113	[1]	2,600	[1]	2,680	[1]	5,200	[1]
Amortization of prior service cost (1)	357	[1]	390	[1]	714	[1]	780	[1]
Current-period other comprehensive income (loss)	3,059		6,356		4,996		8,994
Tax effect	(975)		56		(1,563)		89
Ending balance	$ (75,502)		$ (130,805)		$ (75,502)		$ (130,805)

[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.