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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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CONSOLIDATED BALANCE SHEETS |  |
Accounts receivable, allowances (in dollars) | $ 7,396 | $ 7,851
Other accounts receivable, allowances (in dollars) | $ 667 | $ 660
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized shares | 70,000,000 | 70,000,000
Common stock, issued shares | 29,317,699 | 29,045,309
Treasury stock, at cost, shares | 3,783,227 | 3,656,938

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