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Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jun. 10, 2014
Other comprehensive income, tax expense | $ 37 | $ 141 | $ 37 | $ 314 |
3.25% Convertible Notes | Convertible Debt |  |  |  |  |
Stated interest rate |  |  |  |  | 3.25%

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