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Goodwill And Intangible Assets (Schedule of Carrying Amount and Accumulated Amortization of Intangible Asset) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Gross balance $ 40,281 $ 37,285
Aqcuisiton of customer list   146
Additions for acquisitions 9,957 2,850
Accumulated amortization (34,825) (29,930)
Net Balance 15,413 10,351
Customer And Referral Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross balance 29,872 27,896
Aqcuisiton of customer list   146
Additions for acquisitions 4,800 1,830
Accumulated amortization (26,766) (24,055)
Net Balance 7,906 5,817
Trade Names And Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross balance 8,161 7,181
Additions for acquisitions 5,100 980
Accumulated amortization (6,296) (4,587)
Net Balance 6,965 3,574
State Licenses [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross balance 150 150
Net Balance 150 150
Non-competition Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross balance 2,098 2,058
Additions for acquisitions 57 40
Accumulated amortization (1,763) (1,288)
Net Balance $ 392 $ 810