Accumulated Comprehensive Income (Loss) (Schedule of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		$ (144,467)	$ (72,261)	$ (138,447)	$ (73,160)
Other comprehensive income (loss)		7,617	383	(3,702)	425
Currency impact		122	297	2,413	310
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	[1]	2,244	1,113	4,732	2,680
Amortization of prior service cost (1)	[1]	79	357	154	714
Cost of sales		552	(349)	1,159	(814)
Current-period other comprehensive income (loss)		10,614	1,801	4,756	3,315
Tax effect		(152)	(914)	(314)	(1,529)
Ending balance		(134,005)	(71,374)	(134,005)	(71,374)
Foreign Currency Translation [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(19,652)	3,966	(9,162)	4,554
Other comprehensive income (loss)		2,181	(785)	(8,309)	(1,373)
Amounts reclassified from accumulated other comprehensive income (loss):
Current-period other comprehensive income (loss)		2,181	(785)	(8,309)	(1,373)
Tax effect		0	0	0	0
Ending balance		(17,471)	3,181	(17,471)	3,181
Derivative Instruments [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(867)	1,359	(625)	1,221
Other comprehensive income (loss)		42	(124)	(787)	506
Amounts reclassified from accumulated other comprehensive income (loss):
Cost of sales		552	(349)	1,159	(814)
Current-period other comprehensive income (loss)		594	(473)	372	(308)
Tax effect		(22)	61	(42)	34
Ending balance		(295)	947	(295)	947
Pension and Other Postretirement Benefits [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(123,948)	(77,586)	(128,660)	(78,935)
Other comprehensive income (loss)		5,394	1,292	5,394	1,292
Currency impact		122	297	2,413	310
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	[1]	2,244	1,113	4,732	2,680
Amortization of prior service cost (1)	[1]	79	357	154	714
Current-period other comprehensive income (loss)		7,839	3,059	12,693	4,996
Tax effect		(130)	(975)	(272)	(1,563)
Ending balance		$ (116,239)	$ (75,502)	$ (116,239)	$ (75,502)

[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.