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Condensed Consolidated Balance Sheets Parenthetical (USD $) In Thousands, except Share data, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
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Common stock, par value | $ 0.01 | $ 0.01
Common stock, shares authorized | 150,000,000 | 150,000,000
Common stock, shares issued | 30,375,870 | 30,041,584
Common stock, shares outstanding | 30,375,870 | 30,041,584
Allowance for Doubtful Accounts Receivable, Current | $ 5,364 | $ 4,080

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