CONSOLIDATED STATEMENTS OF EARNINGS (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 163,100,000	$ 179,800,000
Cost of goods sold	105,500,000	110,800,000
Restructuring charges - cost of goods sold	1,400,000	500,000
Gross profit	56,200,000	68,500,000
Research and development expenses	25,700,000	24,700,000
Selling and administrative expenses	36,200,000	37,600,000
Restructuring charges	3,900,000	1,800,000
Operating expenses	65,800,000	64,100,000
Operating (loss) earnings	(9,600,000)	4,400,000
Interest expense, net	3,700,000	3,500,000
Other (income) expense, net	(2,700,000)	1,000,000.0
Loss before income taxes and discontinued operations	(10,600,000)	(100,000)
Provision for income taxes	2,200,000	2,600,000
Loss from continuing operations	(12,800,000)	(2,700,000)
Earnings from discontinued operations, net	3,700,000	0
Net loss	$ (9,100,000)	$ (2,700,000)
Earnings per share:
Earnings (loss) from continuing operations, per basic share	$ (0.14)	$ (0.03)
Earnings (loss) from continuing operations, per diluted share	(0.14)	(0.03)
Earnings from discontinued operations, per basic share	0.04	0
Earnings from discontinued operations, per diluted share	0.04	0
Net earnings (loss) per share, basic	(0.10)	(0.03)
Net earnings (loss) per share, diluted	$ (0.10)	$ (0.03)
Weighted-average common shares outstanding:
Basic (in shares)	91,795,980	90,535,188
Diluted (in shares)	91,795,980	90,535,188