Acquired Card Receivables - Additional Information (Details) $ in Millions	12 Months Ended
	Jun. 30, 2021 USD ($)
Acquired Card Receivables [Line Items]
Acquired card receivable as collateral	$ 133.3
Grace period to payment on acquired card receivables	5 days
Acquired card receivables, minimum number of past due days to accrue fees	90 days
Prepaid Expenses and Other Current Assets
Acquired Card Receivables [Line Items]
Card receivables held for sale, amount	$ 2.6
Fair value of beneficial interest derivative	$ 2.3