Acquired Card Receivables - Schedule of Acquired Card Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021
Acquired Card Receivables [Abstract]
Gross amount of acquired card receivables	$ 218,021		$ 148,833
Less: allowance for credit losses	(4,607)	$ (3,717)	(1,740)
Total	$ 213,414		$ 147,093