Stock-Based Compensation (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 3,707	$ 809	$ 8,065	$ 1,447
Sales and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	1,012	167	2,180	325
Technology and Analytics [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	778	142	1,719	290
Processing and Servicing [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	227	65	530	126
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation	$ 1,690	$ 435	$ 3,636	$ 706