Derivative Financial Instruments - Balance Sheet Location and Fair Value of Assets Associated with Derivative Financial Instruments (Details) - Not designated as hedging instrument - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other current liabilities
Derivatives, Fair Value [Line Items]
Foreign exchange contracts: Other current liabilities	$ 1,758	$ 157
Other current assets
Derivatives, Fair Value [Line Items]
Foreign exchange contracts: Prepaid expenses and other current assets	$ 0	$ 160