Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2020 USD ($) Segment $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares
Nature of Operations [Abstract]
Number of reportable segments | Segment		3
Inventories [Abstract]
Inventories include finished and in-process products		$ 268,100	$ 313,100
Raw materials and supplies		113,200	109,400
Non-cash impairment charges		1,800	9,800
Intangible assets [Abstract]
Impairment charge		0	0	$ 0
Goodwill related to divestitures	[1]		(8,385)
Goodwill related to divestitures	[2]	2,198
Numerator [Abstract]
Net earnings		$ 109,472	$ 82,047	$ 157,360
Denominator [Abstract]
Denominator for basic EPS - weighted average common shares (in shares) | shares		42,301,000	42,263,000	42,404,000
Effect of dilutive securities (in shares) | shares		45,000	31,000	95,000
Denominator for diluted EPS - diluted weighted average shares outstanding (in shares) | shares		42,346,000	42,294,000	42,499,000
Earnings per Common Share [Abstract]
Basic (in dollars per share) | $ / shares		$ 2.59	$ 1.94	$ 3.71
Diluted (in dollars per share) | $ / shares		$ 2.59	$ 1.94	$ 3.70
Number of antidilutive shares excluded from the diluted EPS calculation (in shares) | shares		0	0	0
Research and Development [Abstract]
Research and development costs		$ 38,500	$ 40,100	$ 43,000
Advertising [Abstract]
Advertising costs		2,000	2,200	$ 2,500
Recently Adopted/Issued Accounting Pronouncements [Abstract]
Allowance for losses on trade accounts receivable		$ 3,891	6,913
Minimum [Member]
Intangible assets [Abstract]
Useful lives of intangible assets		5 years
Maximum [Member]
Intangible assets [Abstract]
Useful lives of intangible assets		20 years
Derivative Financial Instruments [Abstract]
Number of months for contracts to mature		18 months
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
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | ASU 2016-13 [Member]
Recently Adopted/Issued Accounting Pronouncements [Abstract]
Allowance for losses on trade accounts receivable			$ 900
Forward Exchange Contracts [Member] | Maximum [Member]
Derivative Financial Instruments [Abstract]
Number of months for contracts to mature		18 months

[1] In the fourth quarter of 2019, the Company met all of the assets held for sale criteria related to the divestitures of its inks product line and fragrances product line (excluding its essential oils product line). Goodwill of $8.4 million was allocated to those disposal groups and was determined to be fully impaired based on the estimated fair value of each of the disposal groups. See Note 14, Divestitures, for additional information.

[2] In 2020, the fair value of the disposal groups decreased, which resulted in the previously allocated goodwill of $2.2 million to be reallocated to its respective financial reporting units. See Note 14, Divestitures, for additional information.