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Transactions With Related Parties (Schedule Of Transactions With Related Parties) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Sandhill [Member]        
Related Party Transaction [Line Items]        
Related party transaction, revenues [1] $ 806 $ 713 $ 1,505 $ 1,368
Chief Executive Officer [Member]        
Related Party Transaction [Line Items]        
Related party transaction, expenses $ 165 $ 150 $ 360 $ 300
Sandhill Group Llc [Member]        
Related Party Transaction [Line Items]        
Percentage of interest held 50.00%   50.00%  
[1] We own a 50% interest in Sandhill Group, LLC.