Annual report pursuant to Section 13 and 15(d)

Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details)

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Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]      
Amortization expenses $ 4,822 $ 5,561 $ 4,119
Intangible assets 44,616 47,276  
Weighted Average Life in Years 9 years 1 month 6 days 9 years  
Total accumulated amortization (24,348) (19,846)  
Intangible Assets, Net, Total 20,268 27,430  
Purchased Contract Rights [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets 21,988 21,988  
Weighted Average Life in Years 7 years 6 months 7 years 6 months  
Total accumulated amortization (11,010) (8,554)  
Provider Contracts [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets 2,737 2,737  
Weighted Average Life in Years 9 years 9 months 18 days 9 years 9 months 18 days  
Total accumulated amortization (1,241) (931)  
Customer Relationships [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets 13,396 16,056  
Weighted Average Life in Years 8 years 7 years 10 months 24 days  
Total accumulated amortization (10,214) (8,753)  
Trade Names [Member]
      
Finite-Lived Intangible Assets [Line Items]      
Intangible assets 6,495 6,495  
Weighted Average Life in Years 16 years 3 months 18 days 16 years 3 months 18 days  
Total accumulated amortization $ (1,883) $ (1,608)