Finance Receivables - Summary of portfolio delinquencies by origination fiscal year (Details) $ in Thousands	Jun. 30, 2023 USD ($)
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	$ 112,244
Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	96,889
Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	15,355
2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,694
2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,694
2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	40,132
2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	31,760
2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	8,372
2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	41,663
2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	35,211
2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6,452
2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	16,047
2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	15,569
2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	478
2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6,488
2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6,441
2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	47
Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,220
Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,214
Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6
Current
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	89,347
Current | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	77,573
Current | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	11,774
Current | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,682
Current | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,682
Current | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
Current | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	31,930
Current | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	25,588
Current | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6,342
Current | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	32,675
Current | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	27,722
Current | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,953
Current | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	13,056
Current | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	12,627
Current | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	429
Current | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,109
Current | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	5,065
Current | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	44
Current | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,895
Current | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,889
Current | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	6
30-59
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	12,119
30-59 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	10,461
30-59 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,658
30-59 | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	12
30-59 | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	12
30-59 | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
30-59 | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,942
30-59 | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,030
30-59 | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	912
30-59 | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,829
30-59 | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	4,112
30-59 | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	717
30-59 | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,648
30-59 | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,620
30-59 | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	28
30-59 | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	858
30-59 | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	857
30-59 | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1
30-59 | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	830
30-59 | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	830
30-59 | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	9,188
60-89 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	7,501
60-89 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,687
60-89 | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89 | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89 | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
60-89 | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,743
60-89 | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,764
60-89 | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	979
60-89 | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	3,402
60-89 | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2,717
60-89 | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	685
60-89 | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,185
60-89 | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,164
60-89 | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	21
60-89 | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	445
60-89 | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	443
60-89 | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	2
60-89 | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	413
60-89 | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	413
60-89 | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,590
90-120 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	1,354
90-120 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	236
90-120 | 2024
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2024 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2024 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2023
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	517
90-120 | 2023 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	378
90-120 | 2023 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	139
90-120 | 2022
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	757
90-120 | 2022 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	660
90-120 | 2022 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	97
90-120 | 2021
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	158
90-120 | 2021 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	158
90-120 | 2021 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | 2020
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	76
90-120 | 2020 | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	76
90-120 | 2020 | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	0
90-120 | Prior
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	82
90-120 | Prior | Contract Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	82
90-120 | Prior | Direct Loan Portfolio
Financing Receivable, Past Due [Line Items]
Portfolio delinquencies	$ 0