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Funds Borrowed - Summary of Maturity of Broker Pools, Excluding Strategic Partner Reserve Deposits (Detail)
$ in Thousands
Jun. 30, 2020
USD ($)
Debt Disclosure [Abstract]  
Three months or less $ 166,258
Over three months through six months 74,000
Over six months through one year 158,368
Over one year 679,019
Total deposits $ 1,077,645