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Acquisition Activity - Fair Value of Assets Acquired and Liabilities Assumed (Details) - Higher One, Inc's Disbursements Business - USD ($) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2017 | Jun. 15, 2016 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |
Accounts receivable | $ 2,784 |  | $ 2,784 |  | $ 2,784
Prepaid expenses | 418 |  | 418 |  | 418
Fixed assets, net | 229 |  | 229 |  | 229
Total assets acquired | 40,131 |  | 40,131 |  | 40,131
Other liabilities | 5,735 |  | 5,735 |  | 5,735
Deferred revenue | 2,655 |  | 2,655 |  | 2,655
Total liabilities assumed | 8,390 |  | 8,390 |  | 8,390
Net assets acquired | 31,741 |  | 31,741 |  | 31,741
Transaction cash consideration |  | $ 37,000 |  |  | 37,000
Goodwill | 5,259 |  | 5,259 |  | 5,259
Future consideration | 15,000 | 20,000 |  |  |
First Anniversary of Closing |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Future consideration |  | $ 10,000 | 5,000 | $ 10,000 |
Developed software |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets | 27,400 |  | 27,400 |  | 27,400
Other intangible assets |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Finite-lived intangible assets | $ 9,300 |  | $ 9,300 |  | $ 9,300

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