Acquired Card Receivables - Summary of Change in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2021	Dec. 31, 2021
Acquired Card Receivables [Abstract]
Balance, beginning	$ 3,717	$ 1,740
Initial allowance for credit losses on purchased card receivables with credit deterioration	296	310
Provision for expected credit losses	5,190	9,225
Charge-off amounts	(5,020)	(7,296)
Recoveries collected	424	628
Balance, end of period	$ 4,607	$ 4,607