Strategic Investments - Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023	Sep. 30, 2022
Summary of financial information for Cash Converters International Limited
Current assets	$ 722,304		$ 686,652		$ 722,304	$ 686,652	$ 719,719
Total assets	1,508,142		1,420,532		1,508,142	1,420,532	1,467,711
Current liabilities	173,195		145,377		173,195	145,377	191,972
Shareholders’ equity	800,396	$ 774,883	712,588	$ 705,335	800,396	712,588	745,768	$ 692,231
Total liabilities and equity	1,508,142		1,420,532		1,508,142	1,420,532	$ 1,467,711
Gross profit	167,592		149,182		340,165	301,679
Net profit (loss)	21,479	28,470	(6,790)	16,778	$ 49,949	$ 9,988
Cash Converters International Limited
Summary of financial information for Cash Converters International Limited
Current assets		186,572		189,179
Non-current assets		137,271		98,301
Total assets		323,843		287,480
Current liabilities		101,097		91,601
Non-current liabilities		79,926		56,792
Shareholders’ equity		142,820		139,087
Total liabilities and equity		$ 323,843		$ 287,480
Gross revenues	124,874		98,768
Gross profit	73,675		63,800
Net profit (loss)	$ 6,499		$ (73,197)