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v3.21.1

Stock-based Compensation - Options Outstanding (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Additional disclosures |  |
Compensation expense recognized | $ 1,400,000 | $ 1,100,000
Stock option awards |  |
Additional disclosures |  |
Compensation expense recognized | $ 0 | $ 0

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