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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Accounts receivable, allowances | $ 6,471 | $ 5,642
Common stock, par value (in usd per share) | $ 0.01 | $ 0.01

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