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Non-Interest Revenue - Non-Interest Revenue by Business (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Interchange and card revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 30,695 | $ 41,509 | $ 24,681
Deposit fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 7,824 | 10,039 | 8,067
Accounting Standards Update 2014-09 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 5,500 | 5,900 | 1,300
Total revenue from contracts with customers | 43,239 | 55,961 | 34,896
Accounting Standards Update 2014-09 | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
University fees - card and disbursement fees | 1,039 | 1,141 | 581
Total revenue from contracts with customers | 39,558 | 52,689 | 33,329
Accounting Standards Update 2014-09 | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
University fees - subscription revenue | 3,681 | 3,272 | 1,567
Total revenue from contracts with customers | 3,681 | 3,272 | 1,567
Accounting Standards Update 2014-09 | Interchange and card revenue | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 30,695 | 41,509 | 24,681
Accounting Standards Update 2014-09 | Deposit fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 7,824 | 10,039 | 8,067
Accounting Standards Update 2014-09 | Customers Bank Business Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue from contracts with customers | 2,071 | 1,972 | 1,760
Accounting Standards Update 2014-09 | Customers Bank Business Banking | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
University fees - card and disbursement fees | 0 | 0 | 0
Total revenue from contracts with customers | 2,071 | 1,972 | 1,760
Accounting Standards Update 2014-09 | Customers Bank Business Banking | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
University fees - subscription revenue | 0 | 0 | 0
Total revenue from contracts with customers | 0 | 0 | 0
Accounting Standards Update 2014-09 | Customers Bank Business Banking | Interchange and card revenue | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 794 | 782 | 620
Accounting Standards Update 2014-09 | Customers Bank Business Banking | Deposit fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,277 | 1,190 | 1,140
Accounting Standards Update 2014-09 | BankMobile |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total revenue from contracts with customers | 41,168 | 53,989 | 33,136
Accounting Standards Update 2014-09 | BankMobile | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
University fees - card and disbursement fees | 1,039 | 1,141 | 581
Total revenue from contracts with customers | 37,487 | 50,717 | 31,569
Accounting Standards Update 2014-09 | BankMobile | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
University fees - subscription revenue | 3,681 | 3,272 | 1,567
Total revenue from contracts with customers | 3,681 | 3,272 | 1,567
Accounting Standards Update 2014-09 | BankMobile | Interchange and card revenue | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 29,901 | 40,727 | 24,061
Accounting Standards Update 2014-09 | BankMobile | Deposit fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 6,547 | $ 8,849 | $ 6,927

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