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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.

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