Summary of Significant Accounting Policies - Additional Information (Detail) MMBTU in Millions	12 Months Ended
	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%