Property and Equipment (Schedule of Property and Equipment, at Cost) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 128,822	$ 114,383
Less: accumulated depreciation	(69,022)	(62,110)
Net property and equipment	59,800	52,273
Land
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	5,761	4,859
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	85,660	76,025
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 37,401	$ 33,499