Accumulated Other Comprehensive Income (Loss) (Schedule of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		$ (117,896)	$ (144,467)	$ (120,232)	$ (138,447)
Other comprehensive income (loss)		(1,436)	7,617	(1,921)	(3,702)
Currency impact		409	122	512	2,413
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	[1]	1,228	2,244	2,559	4,732
Amortization of prior service cost (1)	[1]	48	79	95	154
Cost of sales		(515)	(552)	(1,055)	(1,159)
Interest expense		620		1,011
Current-period other comprehensive income (loss)		1,384	10,614	3,311	4,756
Tax effect		(1,068)	(152)	(659)	(314)
Ending balance		(117,580)	(134,005)	(117,580)	(134,005)
Foreign Currency Translation [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(19,708)	(19,652)	(22,913)	(9,162)
Other comprehensive income (loss)		(3,298)	2,181	52	(8,309)
Amounts reclassified from accumulated other comprehensive income (loss):
Current-period other comprehensive income (loss)		(3,298)	2,181	52	(8,309)
Tax effect		419	0	274	0
Ending balance		(22,587)	(17,471)	(22,587)	(17,471)
Derivative Instruments [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(3,718)	(867)	(1,860)	(625)
Other comprehensive income (loss)		(893)	42	(4,728)	(787)
Amounts reclassified from accumulated other comprehensive income (loss):
Cost of sales		(515)	(552)	(1,055)	(1,159)
Interest expense		620		1,011
Current-period other comprehensive income (loss)		242	594	(2,662)	372
Tax effect		(85)	(22)	961	(42)
Ending balance		(3,561)	(295)	(3,561)	(295)
Pension and Other Postretirement Benefits [Member]
Change in Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance		(94,470)	(123,948)	(95,459)	(128,660)
Other comprehensive income (loss)		2,755	5,394	2,755	5,394
Currency impact		409	122	512	2,413
Amounts reclassified from accumulated other comprehensive income (loss):
Amortization of actuarial loss (1)	[1]	1,228	2,244	2,559	4,732
Amortization of prior service cost (1)	[1]	48	79	95	154
Current-period other comprehensive income (loss)		4,440	7,839	5,921	12,693
Tax effect		(1,402)	(130)	(1,894)	(272)
Ending balance		$ (91,432)	$ (116,239)	$ (91,432)	$ (116,239)

[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.