Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended													12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes In accumulated other comprehensive income/(Loss) [Roll Forward]
Beginning balance							$ (18,962)					$ (34,091)		$ (18,962)	$ (34,091)
Other comprehensive income/(loss) before reclassifications														(38,465)	13,901
Amounts reclassified from accumulated other comprehensive loss														12,446	1,228
Net current-period other comprehensive income														(26,019)	15,129	(2,504)
Ending balance	(44,981)								(18,962)					(44,981)	(18,962)	(34,091)
Amount Reclassified from AOCI [Abstract]
Interest expense, net														(2,174)	(2,242)	(2,439)
Loss on voluntary pension settlement	(7,170)													(7,170)	0	0
Selling, general and administrative expenses														(52,489)	(47,568)	(45,248)
Cost of Goods Sold														(250,815)	(215,272)	(186,014)
Total before tax														45,506	45,007	31,368
Equity in losses of partially-owned affiliates														(4,623)	(2,262)	(1,766)
Tax benefit														12,627	(14,732)	31,861
Net of tax	27,885	[1]	8,769	[2]	19,667	[3]	982	[4]	8,899	3,574	2,274	11,168	[5]	57,303	25,915	62,303
Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Net of tax														(12,446)	(1,228)
Foreign Currency Translation Adjustments [Member]
Changes In accumulated other comprehensive income/(Loss) [Roll Forward]
Beginning balance							9,990					5,177		9,990	5,177
Other comprehensive income/(loss) before reclassifications														(25,800)	4,813
Amounts reclassified from accumulated other comprehensive loss														4,400	0
Net current-period other comprehensive income														(21,400)	4,813
Ending balance	(11,410)								9,990					(11,410)	9,990
Foreign Currency Translation Adjustments [Member] | Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Equity in losses of partially-owned affiliates														(4,400)
Tax benefit														0
Net of tax														(4,400)
Cash Flow Hedge - Interest Rate Swap [Member]
Changes In accumulated other comprehensive income/(Loss) [Roll Forward]
Beginning balance							(396)					(600)		(396)	(600)
Other comprehensive income/(loss) before reclassifications														(99)	(85)
Amounts reclassified from accumulated other comprehensive loss														302	289
Net current-period other comprehensive income														203	204
Ending balance	(193)								(396)					(193)	(396)
Cash Flow Hedge - Interest Rate Swap [Member] | Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Interest expense, net														(465)	(444)
Tax benefit														163	155
Net of tax														(302)	(289)
Defined Benefit Pension Plans [Member]
Changes In accumulated other comprehensive income/(Loss) [Roll Forward]
Beginning balance							(28,556)					(38,668)		(28,556)	(38,668)
Other comprehensive income/(loss) before reclassifications														(12,566)	9,173
Amounts reclassified from accumulated other comprehensive loss														7,744	939
Net current-period other comprehensive income														(4,822)	10,112
Ending balance	(33,378)								(28,556)					(33,378)	(28,556)
Defined Benefit Pension Plans [Member] | Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Total before tax														(8,024)	(1,389)
Tax benefit														280	450
Net of tax														(7,744)	(939)
Loss on voluntary settlement [Member] | Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Loss on voluntary pension settlement														(7,170)
Actuarial Loss [Member] | Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Selling, general and administrative expenses														(756)	(1,223)
Cost of Goods Sold														(46)	(116)
Prior Service Cost [Member] | Amounts reclassified from accumulated other comprehensive income/(loss) [Member]
Amount Reclassified from AOCI [Abstract]
Selling, general and administrative expenses														$ (52)	$ (50)

[1] Income from continuing operations includes a gain on sale of land of $1,234 and a corresponding tax expense of $387, a benefit of $11,719 for the reversal of a valuation allowance on deferred tax assets, a benefit of $3,948 for favorable audit settlements, and expense of $7,170 related to a voluntary lump sum pension settlement.

[2] Income from continuing operations includes the reversal of a valuation allowance on deferred tax assets of $824.

[3] Income from continuing operations includes the reversal of a valuation allowance on deferred tax assets of $14,161 and a loss of $4,122 related to the purchase of the remaining shares in Zenara.

[4] Income from continuing operations includes the reversal of a valuation allowance on deferred tax assets of $198.

[5] Income from continuing operations includes a gain on sale of an office building of $4,680 and a corresponding tax expense of $1,470 and a benefit of $1,155 due to changes in tax laws.