Operating Expenses (Schedule of Direct Operating Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Expenses [Abstract]
Employee compensation expenses	$ 5,476	$ 6,258
Buildings, facilities and technology expenses	1,546	2,295
Travel, advertising and promotion expenses	4,656	5,937
Other costs of services	1,135	823
Cost of Services, Total	$ 12,813	$ 15,313