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Condensed Consolidated Balance Sheets (Unaudited) Parenthetical - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Current assets: |  |
Accounts receivable, allowance | $ 1,986 | $ 2,405
Other acquired intangibles, accumulated amortization | $ 53,911 | $ 51,212
Shareholders' equity: |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common stock, authorized shares (in shares) | 50,000,000 | 50,000,000
Common stock, issued shares (in shares) | 30,434,162 | 30,543,864
Common stock, outstanding shares (in shares) | 30,434,162 | 30,543,864

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