Consolidated Statement Of Comprehensive Income (Loss) - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenues	$ 872,457,000	$ 850,689,000	$ 927,964,000
Cost of products sold	633,351,000	605,437,000	665,897,000
Gross Profit	239,106,000	245,252,000	262,067,000
Selling, general and administrative expenses	232,242,000	236,357,000	260,061,000
Gain on sale of business	0	(9,790,000)	0
Charges related to restructuring activities	2,534,000	7,358,000	11,829,000
Impairment of goodwill	28,564,000
Impairment of an intangible asset			587,000
Operating Income (Loss)	(24,234,000)	11,327,000	(10,410,000)
Net gain on convertible debt derivatives	0	0	(1,197,000)
Gain (Loss) on Extinguishment of Debt	(9,422,000)	7,360,000	6,165,000
Interest expense	24,307,000	28,499,000	29,076,000
Interest income	(1,000)	(93,000)	(429,000)
Loss Before Income Taxes	(39,118,000)	(24,439,000)	(44,025,000)
Income tax provision	6,445,000	3,841,000	9,302,000
Net Loss	$ (45,563,000)	$ (28,280,000)	$ (53,327,000)
Net Earnings (Loss) per Share—Basic:
Net Earnings (loss) per Share - Basic (in dollars per share)	$ (1.31)	$ (0.83)	$ (1.59)
Weighted Average Shares Outstanding - Basic (in shares)	34,875	34,266	33,594
Net Earnings (Loss) per Share—Assuming Dilution:
Net Earnings (loss) per Share - Assuming Dilution (in dollars per share)	$ (1.31)	$ (0.83)	$ (1.59)
Weighted Average Shares Outstanding - Assuming Dilution (in shares)	35,274	34,375	33,642
Other comprehensive income (loss):
Foreign currency translation adjustments	$ (28,724,000)	$ 43,405,000	$ (8,499,000)
Defined benefit plans:
Amortization of prior service costs and unrecognized losses	(427,000)	(375,000)	(596,000)
Deferred tax adjustment resulting from defined benefit plan activity	(39,000)	55,000	48,000
Valuation reserve associated with defined benefit plan activity	39,000	(55,000)	(48,000)
Current period gain (loss) on cash flow hedges	815,000	(825,000)	(571,000)
Deferred tax benefit (expense) related to gain (loss) on cash flow hedges	(112,000)	103,000	1,000
Other Comprehensive Income (Loss)	(28,448,000)	42,308,000	(9,665,000)
Comprehensive Income (Loss)	$ (74,011,000)	$ 14,028,000	$ (62,992,000)