Consolidated Statement Of Comprehensive Income (Loss) - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 966,497,000	$ 1,047,474,000	$ 1,142,338,000
Cost of products sold	697,246,000	763,847,000	829,514,000
Gross Profit	269,251,000	283,627,000	312,824,000
Selling, general and administrative expenses	296,816,000	303,781,000	318,646,000
Gain on sale of business (pre-tax)	0	(7,386,000)	(24,000)
Charges related to restructuring activities	12,274,000	2,447,000	1,971,000
Impairment of an intangible asset	320,000	0	0
Operating Income (Loss)	(40,159,000)	(15,215,000)	(7,769,000)
Loss (gain) on Convertible Debt Derivatives	3,657,000	(1,268,000)	0
Interest expense	22,907,000	15,875,000	4,136,000
Interest income	(473,000)	(265,000)	(165,000)
Loss from Continuing Operations Before Income Taxes	(66,250,000)	(29,557,000)	(11,740,000)
Income taxes	10,291,000	13,299,000	14,710,000
Loss from Continuing Operations	(76,541,000)	(42,856,000)	(26,450,000)
Gain on sale (net of tax of $0; $0 and $140)	0	0	260,000
Total Net Earnings from Discontinued Operations	0	0	260,000
Net Loss	$ (76,541,000)	$ (42,856,000)	$ (26,190,000)
Net Earnings (Loss) per Share—Basic:
Net loss from continuing operations - Basic (in dollars per share)	$ (2.34)	$ (1.32)	$ (0.82)
Net earnings (loss) from discontinued operations - Basic (in dollars per share	0.00	0.00	0.01
Net Earnings (loss) per Share - Basic (in dollars per share)	$ (2.34)	$ (1.32)	$ (0.81)
Weighted Average Shares Outstanding - Basic (in shares)	32,752	32,471	32,171
Net Earnings (Loss) per Share—Assuming Dilution:
Net loss from continuing operations assuming dilution (in dollars per share)	$ (2.34)	$ (1.32)	$ (0.82)
Net earnings (loss) from discontinued operations assuming dilution (in dollars per share)	0.00	0.00	0.01
Net Earnings (loss) per Share - Assuming Dilution (in dollars per share)	$ (2.34)	$ (1.32)	$ (0.81)
Weighted Average Shares Outstanding - Assuming Dilution (in shares)	33,216	32,590	32,683
Other comprehensive income (loss):
Foreign currency translation adjustments	$ 54,591,000	$ (7,194,000)	$ (81,404,000)
Defined benefit plans:
Amortization of prior service costs and unrecognized losses	3,596,000	(1,580,000)	(1,375,000)
Amounts arising during the year, primarily addition of new participants	0	0	784,000
Deferred tax adjustment resulting from defined benefit plan activity	(67,000)	(134,000)	(44,000)
Valuation reserve (reversal) associated with defined benefit plan activity	67,000	223,000	47,000
Current period gain (loss) on cash flow hedges	(2,088,000)	(1,407,000)	2,731,000
Deferred tax benefit (loss) related to gain (loss) on cash flow hedges	106,000	144,000	(177,000)
Other Comprehensive Earnings (Loss)	56,205,000	(9,948,000)	(81,006,000)
Comprehensive Loss	$ (20,336,000)	$ (52,804,000)	$ (107,196,000)