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Stock Plans - Schedule of Stock Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Share-based Payment Arrangement [Abstract] |  |  |  |
Stock compensation expense | $ 7,403 | $ 830 | $ 10,695 | $ 4,352
Income tax expense | 1,784 | 202 | 2,577 | 1,062
Stock compensation expense, net of tax | $ 5,619 | $ 628 | $ 8,118 | $ 3,290

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