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Trade Accounts Receivable, Net | 3 Months Ended
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Mar. 31, 2012
Trade Accounts Receivable, Net |
Trade Accounts Receivable, Net |
2. Trade Accounts Receivable, Net Trade accounts receivable consisted of the following: (in thousands)
|  | At March 31, |  | At December 31, |
|  | 2012 |  | 2011 |  | 2011 |
Trade accounts receivable |  | $ | 110,133 |  | $ | 94,641 |  | $ | 78,642 |
Allowance for doubtful accounts |  | (1,086 | ) | (1,457 | ) | (991 | )
Allowance for sales discounts and returns |  | (1,790 | ) | (2,108 | ) | (1,231 | )
|  | $ | 107,257 |  | $ | 91,076 |  | $ | 76,420 |

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