Annual report pursuant to Section 13 and 15(d)

Property and Equipment (Details 1)

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Property and Equipment (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Depreciation and amortization expense for property and equipment      
Depreciation and amortization expense $ 4,685 $ 3,862 $ 2,980