Acquired Card Receivables - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2021	Jun. 30, 2021
Financing Receivable, Past Due [Line Items]
Acquired card receivable as collateral	$ 190.0
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
Financing Receivable, Past Due [Line Items]
Card receivables held for sale, amount	$ 8.2	$ 2.6
Fair value of beneficial interest derivative	$ 2.8	$ 2.3