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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
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Consolidated Balance Sheets [Abstract] |  |
Allowances for doubtful accounts | $ 2.4 | $ 1.9
Inventory allowances | $ 9.0 | $ 8.9
Common stock, par value | $ 0.01 | $ 0.01
Common stock, shares authorized | 40,000,000 | 40,000,000
Common stock, shares issued | 29,554,500 | 29,554,500
Treasury stock, shares | 6,054,840 | 6,222,076

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