CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Sales	$ 1,428,100,000	$ 1,302,300,000	$ 1,132,900,000
Cost of sales	879,100,000	820,800,000	718,300,000
Gross profit	549,000,000.0	481,500,000	414,600,000
Selling, general, and administrative expenses	411,900,000	363,700,000	315,600,000
Restructuring charges	800,000	2,600,000	2,200,000
Write-off of property, plant, and equipment	0	0	16,300,000
Intangible asset impairment charge	6,500,000	0	0
Operating profit	129,800,000	115,200,000	80,500,000
Pension settlement charges	21,000,000.0	5,700,000	2,200,000
Interest expense	21,700,000	20,900,000	7,400,000
Other income, net	(3,800,000)	(9,600,000)	(7,700,000)
Income before income tax expense (benefit)	90,900,000	98,200,000	78,600,000
Income tax expense (benefit)	23,400,000	24,900,000	(1,600,000)
Net earnings	$ 67,500,000	$ 73,300,000	$ 80,200,000
Net earnings per share:
Basic (in dollars per share)	$ 1.38	$ 1.51	$ 1.66
Diluted (in dollars per share)	$ 1.36	$ 1.49	$ 1.63
Weighted-average common shares outstanding: (in thousands)
Basic (in shares)	48,846,000	48,657,000	48,423,000
Diluted (in shares)	49,457,000	49,218,000	49,160,000
Other comprehensive income (loss), net of tax:
Unrealized loss on cash flow hedge	$ (3,600,000)	$ (1,300,000)	$ 0
Pension and other post-employment liability adjustments, net of tax	4,300,000	2,600,000	(5,300,000)
Foreign currency translation adjustments	3,200,000	(13,100,000)	4,900,000
Foreign currency translation adjustments on long term intercompany notes	(4,900,000)	(8,100,000)	0
Total other comprehensive loss, net	(1,000,000.0)	(19,900,000)	(400,000)
Comprehensive income	$ 66,500,000	$ 53,400,000	$ 79,800,000