Goodwill and Intangible Assets (Schedule of Carrying Amount and Accumulated Amortization of Intangible Asset) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross balance	$ 50,238	$ 50,238
Accumulated amortization	(35,871)	(34,825)
Net Balance	14,367	15,413
Customer And Referral Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross balance	34,672	34,672
Accumulated amortization	(27,342)	(26,766)
Net Balance	7,330	7,906
Trade Names And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross balance	13,261	13,261
Accumulated amortization	(6,739)	(6,296)
Net Balance	6,522	6,965
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	2,155	2,155
Accumulated amortization	(1,790)	(1,763)
Net Balance	$ 365	$ 392