Property and Equipment (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment	$ 18,771	$ 14,813
Less accumulated depreciation and amortization	(9,800)	(7,778)
Property and equipment, net	8,971	7,035
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	6,094	6,164
Computer Hardware and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,400	1,198
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	9,860	5,937
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	973	974
Websites [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	304	400
Automobiles and Trucks [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 140	$ 140