Intangible Assets (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Intangible Assets [Abstract]        
Amortization of intangible assets $ 238 $ 263 $ 475 $ 539