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Commitments And Contingencies (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Commitments And Contingencies [Abstract]        
Total rent expense $ 557 $ 413 $ 1,136 $ 827