Strategic Investments - Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Summary of financial information for Cash Converters International Limited
Current assets	$ 612,771	$ 606,644	$ 612,771		$ 606,644		$ 610,861
Total assets	1,299,996	1,196,253	1,299,996		1,196,253		1,266,911
Current liabilities	137,187	121,480	137,187		121,480		155,088
Total liabilities and stockholders' equity	1,299,996	1,196,253	1,299,996		1,196,253		$ 1,266,911
Gross profit	128,928	113,748	261,039		222,138
Net profit (loss)	$ 14,887	$ 5,330	$ 30,608		$ 9,629
Cash Converters International Limited
Summary of financial information for Cash Converters International Limited
Current assets				$ 162,558		$ 170,412
Non-current assets				185,780		189,810
Total assets				348,338		360,222
Current liabilities				59,701		59,962
Non-current liabilities				59,915		58,368
Shareholders’ equity				228,722		241,892
Total liabilities and stockholders' equity				348,338		360,222
Gross revenues				84,185		71,153
Gross profit				55,280		51,231
Net profit (loss)				$ 1		$ 5,561