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Concentration Of Credit Risks
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12 Months Ended | ||
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Dec. 31, 2011
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| Concentration Of Credit Risks [Abstract] | |||
| Concentration Of Credit Risks |
Financial instruments which potentially subject the Company to concentration of credit risk consist principally of cash and cash equivalents and trade receivables. The Company places its cash and cash equivalents with high credit quality financial institutions. Concentrations of credit risk with respect to sales and trade receivables are limited due to the large number of customers comprising the Company's customer base and their dispersion across geographic areas. The Company performs periodic credit evaluations of its customers' financial condition and generally does not require collateral. For the year ended December 31, 2011, the largest three customers accounted for 41.0% of sales and 52.0% of the year-end accounts receivable balance. For the year ended December 31, 2010, the largest three customers accounted for 43.7% of sales and 52.5% of the year-end accounts receivable balance. For the year ended December 31, 2009, the largest three customers accounted for 42.8% of sales and 55.0% of the year-end accounts receivable balance. No other customer accounted for more than 5.0% of the Company's total sales in 2011, 2010 or 2009. Concentration of credit risk with respect to purchases and trade payables are limited due to the large number of vendors comprising the Company's vendor base, with dispersion across different industries and geographic areas. The Company's largest vendor in terms of annual purchases accounted for 10.0% of the Company's total purchases and 3.9% of the Company's total trade payables on December 31, 2011. |