Acquired Card Receivables - Summary of Change in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Allowance For Credit Losses [Roll Forward]
Balance, beginning	$ 11,948	$ 4,607	$ 5,414	$ 1,740
Initial allowance for credit losses on purchased card receivables with credit deterioration	0	1	10	311
Provision for expected credit losses	8,425	6,085	23,529	15,310
Charge-off amounts	(7,155)	(5,774)	(16,568)	(13,070)
Recoveries collected	377	481	1,210	1,109
Balance, end of period	$ 13,595	$ 5,400	$ 13,595	$ 5,400