Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Segment $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Nature of Operations [Abstract]
Number of reportable segments | Segment	3
Inventories [Abstract]
Inventories include finished and in-process products	$ 310,400	$ 273,800
Raw materials and supplies	153,100	130,500
Intangible assets [Abstract]
Impairment charge	0	0	$ 0
Numerator [Abstract]
Net earnings from continuing operations	$ 89,600	$ 122,913	$ 107,247
Denominator [Abstract]
Denominator for basic EPS - weighted-average common shares | shares	43,780,000	44,523,000	45,910,000
Effect of dilutive securities (in shares) | shares	251,000	320,000	294,000
Denominator for diluted EPS - adjusted weighted-average shares outstanding | shares	44,031,000	44,843,000	46,204,000
EPS from continuing operations [Abstract]
Basic (in dollars per share) | $ / shares	$ 2.05	$ 2.76	$ 2.34
Diluted (in dollars per share) | $ / shares	$ 2.03	$ 2.74	$ 2.32
Number of antidilutive shares excluded from the diluted EPS calculation (in shares) | shares	0	0	0
Research and Development [Abstract]
Research and development costs	$ 40,900	$ 40,900	$ 35,100
Advertising [Abstract]
Advertising costs	$ 2,200	$ 2,300	$ 1,700
Minimum [Member]
Intangible assets [Abstract]
Useful lives of intangible assets	5 years
Maximum [Member]
Intangible assets [Abstract]
Useful lives of intangible assets	20 years
Building and Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful lives	5 years
Building and Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful lives	40 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful lives	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Abstract]
Estimated useful lives	20 years
Forward Exchange Contracts [Member] | Maximum [Member]
Derivative [Line Items]
Number of months for contracts to mature	18 months