Operating Expenses (Schedule of Direct Operating Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating Expenses [Abstract]
Employee compensation expenses	$ 9,332	$ 6,278	$ 15,590	$ 10,875
Buildings, facilities and technology expenses	2,394	1,832	4,689	3,447
Travel, advertising and promotion expenses	7,979	6,933	13,916	11,087
Other costs of services	53	1,984	876	3,227
Cost of Services, Total	$ 19,758	$ 17,027	$ 35,071	$ 28,636