Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details 1)

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Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Amortization expense for intangible assets    
Amortization expense $ 1,584 $ 979