Fair Value Measurements - Financial Assets, Temporary Equity, and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Financial assets:
Investment in unconsolidated affiliate	$ 53,404	$ 56,182	$ 99,219
Level 1
Financial assets:
Cash and cash equivalents	22,781	59,124	77,599
Restricted cash	16,157	15,137	60,218
Pawn loans	0	0	0
Consumer loans, net	0	0	0
Pawn service charges receivable, net	0	0	0
Consumer loan fees and interest receivable, net	0	0	0
Investment in unconsolidated affiliate	58,773	56,182	123,932
Restricted cash, non-current	2,667	2,883	4,310
Non-current consumer loans, net	0	0	0
Total	100,378	133,326	266,059
Temporary equity:
Common Stock, subject to possible redemption	0	0
Redeemable noncontrolling interest	0	0	0
Total	0	0
Financial liabilities:
2.125% cash convertible senior notes due 2019	0	0	0
Total	0	0	0
Level 1 | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	0	0	0
Level 1 | Unsecured notes
Financial liabilities:
Notes	0	0	0
Level 1 | Secured notes
Financial liabilities:
Notes	0	0	0
Level 1 | Foreign currency debt
Financial liabilities:
Debt instrument	0	0	0
Level 2
Financial assets:
Cash and cash equivalents	0	0	0
Restricted cash	0	0	0
Pawn loans	0	0	0
Consumer loans, net	0	0	0
Pawn service charges receivable, net	0	0	0
Consumer loan fees and interest receivable, net	0	0	0
Investment in unconsolidated affiliate	0	0	0
Restricted cash, non-current	0	0	0
Non-current consumer loans, net	0	0	0
Total	0	0	0
Temporary equity:
Common Stock, subject to possible redemption	0	0
Redeemable noncontrolling interest	0	0	0
Total	0	0
Financial liabilities:
2.125% cash convertible senior notes due 2019	156,400	169,050	185,461
Total	312,239	341,313	413,284
Level 2 | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	39,694	40,774	49,604
Level 2 | Unsecured notes
Financial liabilities:
Notes	20,521	20,477	18,787
Level 2 | Secured notes
Financial liabilities:
Notes	21,814	22,476	23,957
Level 2 | Foreign currency debt
Financial liabilities:
Debt instrument	18,720	19,851	23,952
Level 3
Financial assets:
Cash and cash equivalents	0	0	0
Restricted cash	0	0	0
Pawn loans	157,905	159,964	150,930
Consumer loans, net	32,715	37,559	61,936
Pawn service charges receivable, net	31,342	30,852	30,241
Consumer loan fees and interest receivable, net	12,827	19,802	13,199
Investment in unconsolidated affiliate	0	0	0
Restricted cash, non-current	0	0	0
Non-current consumer loans, net	72,789	77,644	79,615
Total	307,578	325,821	335,921
Temporary equity:
Common Stock, subject to possible redemption	11,639	11,438
Redeemable noncontrolling interest	5,467	5,467	44,771
Total	17,106	16,905
Financial liabilities:
2.125% cash convertible senior notes due 2019	0	0	0
Total	0	0	0
Level 3 | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	0	0	0
Level 3 | Unsecured notes
Financial liabilities:
Notes	0	0	0
Level 3 | Secured notes
Financial liabilities:
Notes	0	0	0
Level 3 | Foreign currency debt
Financial liabilities:
Debt instrument	0	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	22,781	59,124	77,599
Restricted cash	16,157	15,137	60,218
Pawn loans	157,905	159,964	150,930
Consumer loans, net	32,175	36,533	61,347
Pawn service charges receivable, net	31,342	30,852	30,241
Consumer loan fees and interest receivable, net	12,827	19,802	13,199
Investment in unconsolidated affiliate	53,404	56,182	99,219
Restricted cash, non-current	2,667	2,883	4,310
Non-current consumer loans, net	71,502	75,824	78,362
Total	400,760	456,301	575,425
Temporary equity:
Common Stock, subject to possible redemption	11,696	11,696
Redeemable noncontrolling interest	2,379	3,235	18,550
Total	14,075	14,931
Financial liabilities:
2.125% cash convertible senior notes due 2019	190,089	187,471	179,796
Total	349,354	361,006	404,269
Carrying Value | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	40,080	40,493	46,110
Carrying Value | Unsecured notes
Financial liabilities:
Notes	19,893	20,987	18,461
Carrying Value | Secured notes
Financial liabilities:
Notes	20,034	20,286	23,535
Carrying Value | Foreign currency debt
Financial liabilities:
Debt instrument	17,802	18,505	23,199
Estimated Fair Value
Financial assets:
Cash and cash equivalents	22,781	59,124	77,599
Restricted cash	16,157	15,137	60,218
Pawn loans	157,905	159,964	150,930
Consumer loans, net	32,715	37,559	61,936
Pawn service charges receivable, net	31,342	30,852	30,241
Consumer loan fees and interest receivable, net	12,827	19,802	13,199
Investment in unconsolidated affiliate	58,773	56,182	123,932
Restricted cash, non-current	2,667	2,883	4,310
Non-current consumer loans, net	72,789	77,644	79,615
Total	407,956	459,147	601,980
Temporary equity:
Common Stock, subject to possible redemption	11,639	11,438
Redeemable noncontrolling interest	5,467	5,467	44,771
Total	17,106	16,905
Financial liabilities:
2.125% cash convertible senior notes due 2019	156,400	169,050	185,461
Total	312,239	341,313	413,284
Estimated Fair Value | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	39,694	40,774	49,604
Estimated Fair Value | Unsecured notes
Financial liabilities:
Notes	20,521	20,477	18,787
Estimated Fair Value | Secured notes
Financial liabilities:
Notes	21,814	22,476	23,957
Estimated Fair Value | Foreign currency debt
Financial liabilities:
Debt instrument	18,720	19,851	23,952
Variable Interest Entity, Primary Beneficiary | Level 1 | Secured notes
Financial liabilities:
Notes	0	0	0
Variable Interest Entity, Primary Beneficiary | Level 2 | Secured notes
Financial liabilities:
Notes	55,090	68,685	111,523
Variable Interest Entity, Primary Beneficiary | Level 3 | Secured notes
Financial liabilities:
Notes	0	0	0
Variable Interest Entity, Primary Beneficiary | Carrying Value | Secured notes
Financial liabilities:
Notes	61,456	73,264	113,168
Variable Interest Entity, Primary Beneficiary | Estimated Fair Value | Secured notes
Financial liabilities:
Notes	$ 55,090	$ 68,685	$ 111,523