Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment (Details 2)

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Property and Equipment (Details 2) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Depreciation and amortization expense for property and equipment        
Depreciation and amortization expense $ 1,658 $ 1,553 $ 3,133 $ 3,042