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Employee benefits
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12 Months Ended |
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Dec. 31, 2011
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| Employee Benefits [Abstract] | |
| Compensation and Employee Benefit Plans [Text Block] |
EMPLOYEE BENEFITS
The Company has salary reduction/profit sharing plans under the provisions of Section 401(k) of the Internal Revenue Code. The plans cover all employees who have completed the minimum service requirement, as defined by the plans. The plans require the Company to contribute 100% of the first six percent of base compensation that a participant contributes to the plans. Matching contributions made by the Company were $2,238,373, $2,597,135 and $2,859,197 for the years ended December 31, 2009, 2010 and 2011, respectively.
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