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Non-Interest Revenues - Non-Interest Revenue by Business (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 40,194 | $ 46,720 | $ 43,239
Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 36,114 | 42,764 | 39,558
Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 4,080 | 3,956 | 3,681
Interchange and card revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 21,039 | 28,941 | 30,695
Interchange and card revenue | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 21,039 | 28,941 | 30,695
Deposit fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 13,835 | 12,815 | 7,824
Deposit fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 13,835 | 12,815 | 7,824
University fees - card and disbursement fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,240 | 1,008 | 1,039
University fees - subscription revenue | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 4,080 | 3,956 | 3,681
Customers Bank Business Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | (2,718) | 2,523 | 2,071
Customers Bank Business Banking | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | (2,718) | 2,523 | 2,071
Customers Bank Business Banking | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
Customers Bank Business Banking | Interchange and card revenue | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | (5,245) | 781 | 794
Customers Bank Business Banking | Deposit fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 2,527 | 1,742 | 1,277
Customers Bank Business Banking | University fees - card and disbursement fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
Customers Bank Business Banking | University fees - subscription revenue | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 | 0
BankMobile |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 42,912 | 44,197 | 41,168
BankMobile | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 38,832 | 40,241 | 37,487
BankMobile | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 4,080 | 3,956 | 3,681
BankMobile | Interchange and card revenue | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 26,284 | 28,160 | 29,901
BankMobile | Deposit fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 11,308 | 11,073 | 6,547
BankMobile | University fees - card and disbursement fees | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,240 | 1,008 | 1,039
BankMobile | University fees - subscription revenue | Transferred over Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 4,080 | $ 3,956 | $ 3,681
BankMobile | Interchange And Card Revenue, Difference Between Regulated And Unregulated Interchange Rates | Transferred at Point in Time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 5,900 |  |

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