Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment (Details 1)

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Property and Equipment (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Depreciation and amortization expense for property and equipment        
Depreciation and amortization expense $ 1,182 $ 1,031 $ 3,442 $ 2,845