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Summary of Significant Accounting Policies - Additional Information (Detail) MMBTU in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) MMBTU Customer Subsidiary | Dec. 31, 2020 USD ($) Customer | Dec. 31, 2019 USD ($) Customer
Summary Of Significant Accounting Policy [Line Items] |  |  |
Cash and cash equivalents | $ 159,186,000 | $ 349,938,000 |
Single customer comprised more than 10 percent of the Company's consolidated net sales | Customer | 0 | 0 | 0
Cost of maintenance and repairs | $ 75,351,000 | $ 69,234,000 | $ 58,464,000
Total research and development expenses | $ 38,778,000 | 35,999,000 | $ 34,139,000
Capitalized Environmental expenditures depreciation period | 10 years |  |
Indefinite-life intangible assets | $ 0 |  |
Number of foreign subsidiaries | Subsidiary | 4 |  |
Natural Gas [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Volume in derivative contract | MMBTU | 1.4 |  |
Purchased Contract Price | $ 5,712,000 |  |
Building [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 30 years |  |
Building Improvements [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 15 years |  |
Minimum [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Concentration risk Payment terms extended | 30 days |  |
Percentage of Tax benefit recognized | 50.00% |  |
Minimum [Member] | Patents [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 15 years |  |
Minimum [Member] | Non-compete Agreements [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 3 years |  |
Minimum [Member] | Trademarks [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 8 years |  |
Minimum [Member] | Customer Relationships [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 12 years |  |
Minimum [Member] | Know-how [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 7 years |  |
Minimum [Member] | Manufacturing Equipment [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 10 years |  |
Minimum [Member] | Furniture and Fixtures [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 5 years |  |
Minimum [Member] | Vehicles [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 3 years |  |
Minimum [Member] | Computers Equipment And Software [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 3 years |  |
Maximum [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Concentration risk Payment terms extended | 60 days |  |
Maximum [Member] | Trademarks [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 11 years |  |
Maximum [Member] | Customer Relationships [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 20 years |  |
Maximum [Member] | Know-how [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Finite-lived intangible asset, useful life | 20 years |  |
Maximum [Member] | Manufacturing Equipment [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 15 years |  |
Maximum [Member] | Furniture and Fixtures [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 10 years |  |
Maximum [Member] | Vehicles [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 5 years |  |
Maximum [Member] | Computers Equipment And Software [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Lives used for calculating depreciation expense | 10 years |  |
Money Market Funds [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Cash and cash equivalents | $ 46,689,000 | 123,695,000 |
Demand Deposit [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Cash and cash equivalents | 25,253,000 | 76,164,000 |
Non-U.S. Subsidiaries [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Cash and cash equivalents | $ 87,244,000 | $ 150,079,000 |
Nanjing Stepan Jinling Chemical Limited Liability Company [Member] |  |  |
Summary Of Significant Accounting Policy [Line Items] |  |  |
Ownership percentage | 80.00% |  |

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