Consolidated Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenue:      
Account revenue $ 135,847 $ 150,715 $ 142,589
Payment transaction revenue 41,109 23,168 18,733
Higher education institution revenue 33,155 21,016 16,614
Other revenue 1,012 2,821 3,112
Revenue before customer credit plan 211,123 197,720 181,048
Less customer credit plan 0 0 (4,728)
Revenue 211,123 197,720 176,320
Cost of revenue 88,824 80,280 67,560
Gross margin 122,299 117,440 108,760
Operating expenses:      
General and administrative 58,555 46,321 37,715
Product development 9,305 5,221 3,265
Sales and marketing 17,058 12,284 20,265
Gain (Loss) Related to Litigation Settlement 16,320 0 0
Merger and acquisition related expenses (4,791) (5,828) 0
Total operating expenses 96,447 57,998 61,245
Income from operations 25,852 59,442 47,515
Interest income 88 109 68
Interest expense (3,082) (967) (266)
Other income 622 310 1,500
Net income before income taxes 23,480 58,894 48,817
Income tax expense 9,352 22,024 16,924
Net income 14,128 36,870 31,893
Net income available to common stockholders:      
Basic 14,128 36,870 31,893
Participating securities 0 0 0
Diluted $ 14,128 $ 36,870 $ 31,893
Weighted average shares outstanding:      
Basic (in shares) 46,717,359 53,877,879 55,210,972
Diluted (in shares) 48,368,365 56,728,807 59,553,678
Net income available to common stockholders per common share:      
Basic (in dollars per share) $ 0.30 $ 0.68 $ 0.58
Diluted (in dollars per share) $ 0.29 $ 0.65 $ 0.54