Fair Value Measurements - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2020	Apr. 01, 2019
Financial liabilities:
Interest on note receivable	2.89%
Notes receivable from Grupo Finmart, net | Carrying Value
Financial assets:
Notes receivable, fair value			$ 7,450
Notes receivable from Grupo Finmart, net | Estimated Fair Value
Financial assets:
Notes receivable, fair value			7,729
Notes receivable from Grupo Finmart, net | Estimated Fair Value | Level 1
Financial assets:
Notes receivable, fair value			0
Notes receivable from Grupo Finmart, net | Estimated Fair Value | Level 2
Financial assets:
Notes receivable, fair value			0
Notes receivable from Grupo Finmart, net | Estimated Fair Value | Level 3
Financial assets:
Notes receivable, fair value			$ 7,729
2.89% promissory note receivable due April 2024
Financial assets:
Notes receivable, fair value					$ 1,100
Financial liabilities:
Interest on note receivable	2.89%	2.89%	2.89%	2.89%
2.89% promissory note receivable due April 2024 | Carrying Value
Financial assets:
Notes receivable, fair value		$ 1,156	$ 1,124	$ 1,148
2.89% promissory note receivable due April 2024 | Estimated Fair Value
Financial assets:
Notes receivable, fair value		1,156	1,124	1,148
2.89% promissory note receivable due April 2024 | Estimated Fair Value | Level 1
Financial assets:
Notes receivable, fair value		0	0	0
2.89% promissory note receivable due April 2024 | Estimated Fair Value | Level 2
Financial assets:
Notes receivable, fair value		0	0	0
2.89% promissory note receivable due April 2024 | Estimated Fair Value | Level 3
Financial assets:
Notes receivable, fair value		1,156	1,124	1,148
Investments in unconsolidated affiliates | Carrying Value
Financial assets:
Investments in unconsolidated affiliates, fair value		31,773	29,272	32,458
Investments in unconsolidated affiliates | Estimated Fair Value
Financial assets:
Investments in unconsolidated affiliates, fair value		44,716	42,460	32,597
Investments in unconsolidated affiliates | Estimated Fair Value | Level 1
Financial assets:
Investments in unconsolidated affiliates, fair value		37,039	34,555	24,833
Investments in unconsolidated affiliates | Estimated Fair Value | Level 2
Financial assets:
Investments in unconsolidated affiliates, fair value		0	0	0
Investments in unconsolidated affiliates | Estimated Fair Value | Level 3
Financial assets:
Investments in unconsolidated affiliates, fair value		7,677	7,905	7,764
2024 Convertible Notes | Carrying Value
Financial liabilities:
Debt instruments, fair value		118,736	112,740	117,193
2024 Convertible Notes | Estimated Fair Value
Financial liabilities:
Debt instruments, fair value		134,838	136,634	129,979
2024 Convertible Notes | Estimated Fair Value | Level 1
Financial liabilities:
Debt instruments, fair value		0	0	0
2024 Convertible Notes | Estimated Fair Value | Level 2
Financial liabilities:
Debt instruments, fair value		134,838	136,634	129,979
2024 Convertible Notes | Estimated Fair Value | Level 3
Financial liabilities:
Debt instruments, fair value		0	0	0
2025 Convertible Notes | Carrying Value
Financial liabilities:
Debt instruments, fair value		134,983	127,902	133,164
2025 Convertible Notes | Estimated Fair Value
Financial liabilities:
Debt instruments, fair value		138,000	136,965	137,569
2025 Convertible Notes | Estimated Fair Value | Level 1
Financial liabilities:
Debt instruments, fair value		0	0	0
2025 Convertible Notes | Estimated Fair Value | Level 2
Financial liabilities:
Debt instruments, fair value		138,000	136,965	137,569
2025 Convertible Notes | Estimated Fair Value | Level 3
Financial liabilities:
Debt instruments, fair value		$ 0	$ 0	$ 0
8.5% unsecured debt due 2024
Financial liabilities:
Stated interest rate		8.50%	8.50%	8.50%
8.5% unsecured debt due 2024 | Carrying Value
Financial liabilities:
Debt instruments, fair value		$ 816	$ 1,042	$ 872
8.5% unsecured debt due 2024 | Estimated Fair Value
Financial liabilities:
Debt instruments, fair value		816,000	1,042	872
8.5% unsecured debt due 2024 | Estimated Fair Value | Level 1
Financial liabilities:
Debt instruments, fair value		0	0	0
8.5% unsecured debt due 2024 | Estimated Fair Value | Level 2
Financial liabilities:
Debt instruments, fair value		0	0	0
8.5% unsecured debt due 2024 | Estimated Fair Value | Level 3
Financial liabilities:
Debt instruments, fair value		$ 816,000	1,042	$ 872
CASHMAX secured borrowing facility | Carrying Value
Financial liabilities:
Debt instruments, fair value			(260)
CASHMAX secured borrowing facility | Estimated Fair Value
Financial liabilities:
Debt instruments, fair value			404
CASHMAX secured borrowing facility | Estimated Fair Value | Level 1
Financial liabilities:
Debt instruments, fair value			0
CASHMAX secured borrowing facility | Estimated Fair Value | Level 2
Financial liabilities:
Debt instruments, fair value			0
CASHMAX secured borrowing facility | Estimated Fair Value | Level 3
Financial liabilities:
Debt instruments, fair value			$ 404