Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Unrestricted cash and cash equivalents	$ 724,158	$ 423,498
Federal funds sold	480	123
Restricted cash	2,015	0
Investment securities available-for-sale, at fair-value	46,650	116,159
Settlement assets	148,694	37,004
Accounts receivable, net	48,904	46,384
Prepaid expenses and other assets	23,992	27,332
Income tax receivable	16,290	15,573
Total current assets	1,011,183	666,073
Restricted cash	2,152	2,970
Investment securities, available-for-sale, at fair value	73,781	82,585
Accounts receivable, net	13	5,913
Loans to bank customers, net of allowance for loan losses of $444 and $464 as of December 31, 2014 and 2013, respectively	6,550	6,902
Prepaid expenses and other assets	11,883	1,081
Property and equipment, net	77,284	60,473
Deferred expenses	17,326	15,439
Noncurrent net deferred tax assets	6,268	3,362
Goodwill and intangible assets	417,200	30,676
Total assets	1,623,640	875,474
Current liabilities:
Accounts payable	36,444	34,940
Deposits	565,401	219,580
Obligations to customers	98,052	65,449
Settlement obligations	4,484	4,839
Amounts due to card issuing banks for overdrawn accounts	1,224	49,930
Other accrued liabilities	79,137	35,878
Deferred revenue	24,418	24,517
Note payable	22,500	0
Net deferred tax liabilities	3,995	3,716
Total current liabilities	835,655	438,849
Other accrued liabilities	31,295	34,076
Deferred revenue	200	300
Note payable	127,500	0
Total liabilities	994,650	473,225
Stockholders equity:
Additional paid-in capital	383,296	199,251
Retained earnings	245,693	203,000
Accumulated other comprehensive loss	(52)	(47)
Total stockholders' equity	628,990	402,249
Total liabilities and stockholders’ equity	1,623,640	875,474
Convertible Series A preferred stock [Member]
Stockholders equity:
Convertible Series A preferred stock, $0.001 par value: 10 shares authorized as of December 31, 2014 and 2013; 2 and 7 shares issued and outstanding as of December 31, 2014 and 2013, respectively	2	7
Class A common stock, $0.001 par value; 100,000 shares authorized as of June 30, 2013 and December 31, 2012, respectively; 32,513 and 31,798 shares issued and outstanding as of June 30, 2013 and December 31, 2012, respectively
Stockholders equity:
Class A common stock, $0.001 par value; 100,000 shares authorized as of December 31, 2014 and 2013; 51,146 and 37,729 shares issued and outstanding as of December 31, 2014 and 2013, respectively	$ 51	$ 38