Acquired Card Receivables - Schedule of Change in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Allowance For Credit Losses [Roll Forward]
Balance, beginning	$ 19,542	$ 20,768	$ 15,020	$ 20,883
Provision for expected credit losses	12,774	9,299	44,626	34,530
Charge-off amounts	(16,942)	(12,173)	(49,788)	(41,186)
Recoveries collected	2,892	2,089	8,408	5,756
Balance, ending	$ 18,266	$ 19,983	$ 18,266	$ 19,983