Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details 2)

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Commitments and Contingencies (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Rent expense for all operating leases      
Rent expense $ 5,103 $ 4,008 $ 2,930