Acquired Card Receivables - Summary of Change in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Allowance For Credit Losses [Roll Forward]
Balance, beginning	$ 20,768	$ 21,509	$ 20,883	$ 15,498
Provision for expected credit losses	9,299	15,104	34,530	41,433
Charge-off amounts	(12,173)	(14,276)	(41,186)	(36,184)
Recoveries collected	2,089	1,516	5,756	3,106
Balance, ending	$ 19,983	$ 23,853	$ 19,983	$ 23,853