Goodwill and Intangible Assets (Schedule of Carrying Amount and Accumulated Amortization of Intangible Asset) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Intangible assets with indefinite lives:	$ 7,186
Intangible assets subject to amortization:
Gross carrying amount	83,769
Accumulated amortization	(49,836)
Intangible assets subject to amortization, net	33,933
Total intangible assets at September 30, 2019	41,119	$ 23,784
Customer And Referral Relationships [Member]
Intangible assets subject to amortization:
Gross carrying amount	48,028
Accumulated amortization	(34,898)
Intangible assets subject to amortization, net	13,130
Total intangible assets at September 30, 2019	13,130
Trade Names And Trademarks [Member]
Intangible assets subject to amortization:
Gross carrying amount	21,566
Accumulated amortization	(12,246)
Intangible assets subject to amortization, net	9,320
Total intangible assets at September 30, 2019	9,320
Non-competition Agreements [Member]
Intangible assets subject to amortization:
Gross carrying amount	2,155
Accumulated amortization	(2,063)
Intangible assets subject to amortization, net	92
Total intangible assets at September 30, 2019	92
State Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets with indefinite lives:	7,186
Intangible assets subject to amortization:
Gross carrying amount	12,020
Accumulated amortization	(629)
Intangible assets subject to amortization, net	11,391
Total intangible assets at September 30, 2019	$ 18,577