Acquired Card Receivables - Schedule of Acquired Card Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
Acquired Card Receivables [Abstract]
Gross amount of acquired card receivables	$ 571,340	$ 474,148
Less: allowance for credit losses	(18,513)	(15,498)	$ (7,541)	$ (5,414)
Total	$ 552,827	$ 458,650