Fair Value Measurements - Financial Assets, Temporary Equity, and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015
Financial assets:
Investment in unconsolidated affiliate	$ 56,677	$ 56,182	$ 94,510
Level 1
Financial assets:
Cash and cash equivalents	75,336	59,124	138,173
Restricted cash	13,817	15,137	47,909
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	59,307	56,182	105,150
Restricted cash, non-current	2,308	2,883	2,880
Non-current consumer loans, net	0	0	0
Total	150,768	133,326	294,112
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	195,233
Total	300,655	341,313	408,340
Level 2 | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	38,312	40,774	46,982
Level 2 | Unsecured notes
Financial liabilities:
Notes	19,793	20,477	18,550
Level 2 | Secured notes
Financial liabilities:
Notes	20,678	22,476	25,650
Level 2 | Foreign currency debt
Financial liabilities:
Debt instrument	17,880	19,851	24,213
Level 3
Financial assets:
Cash and cash equivalents	0	0	0
Restricted cash	0	0	0
Pawn loans	140,195	159,964	127,929
Consumer loans, net	42,975	48,440	75,184
Pawn service charges receivable, net	27,626	30,852	24,909
Consumer loan fees and interest receivable, net	13,226	19,802	13,063
Investment in unconsolidated affiliate	0	0	0
Restricted cash, non-current	0	0	0
Non-current consumer loans, net	105,879	104,194	122,286
Total	329,901	363,252	363,371
Temporary equity:
Common Stock, subject to possible redemption		11,438	11,049
Redeemable noncontrolling interest	2,894	5,467	43,048
Total		16,905	54,097
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	75,336	59,124	138,173
Restricted cash	13,817	15,137	47,909
Pawn loans	140,195	159,964	127,929
Consumer loans, net	26,362	36,533	55,529
Pawn service charges receivable, net	27,626	30,852	24,909
Consumer loan fees and interest receivable, net	13,226	19,802	13,063
Investment in unconsolidated affiliate	56,677	56,182	94,510
Restricted cash, non-current	2,308	2,883	2,880
Non-current consumer loans, net	62,673	75,824	79,860
Total	418,220	456,301	584,762
Temporary equity:
Common Stock, subject to possible redemption		11,696	11,696
Redeemable noncontrolling interest	(1,229)	3,235	16,827
Total		14,931	28,523
Financial liabilities:
2.125% cash convertible senior notes due 2019	192,565	187,471	182,276
Total	331,763	361,006	389,216
Carrying Value | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	33,613	40,493	44,837
Carrying Value | Unsecured notes
Financial liabilities:
Notes	17,097	20,987	18,163
Carrying Value | Secured notes
Financial liabilities:
Notes	20,132	20,286	22,080
Carrying Value | Foreign currency debt
Financial liabilities:
Debt instrument	17,475	18,505	21,726
Estimated Fair Value
Financial assets:
Cash and cash equivalents	75,336	59,124	138,173
Restricted cash	13,817	15,137	47,909
Pawn loans	140,195	159,964	127,929
Consumer loans, net	42,975	48,440	75,184
Pawn service charges receivable, net	27,626	30,852	24,909
Consumer loan fees and interest receivable, net	13,226	19,802	13,063
Investment in unconsolidated affiliate	59,307	56,182	105,150
Restricted cash, non-current	2,308	2,883	2,880
Non-current consumer loans, net	105,879	104,194	122,286
Total	480,669	496,578	657,483
Temporary equity:
Common Stock, subject to possible redemption		11,438	11,049
Redeemable noncontrolling interest	2,894	5,467	43,048
Total		16,905	54,097
Financial liabilities:
2.125% cash convertible senior notes due 2019	156,400	169,050	195,233
Total	300,655	341,313	408,340
Estimated Fair Value | 5.8% Consumer loans facility due 2019
Financial liabilities:
Consumer loans facility	38,312	40,774	46,982
Estimated Fair Value | Unsecured notes
Financial liabilities:
Notes	19,793	20,477	18,550
Estimated Fair Value | Secured notes
Financial liabilities:
Notes	20,678	22,476	25,650
Estimated Fair Value | Foreign currency debt
Financial liabilities:
Debt instrument	17,880	19,851	24,213
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	47,592	68,685	$ 97,712
Variable Interest Entity, Primary Beneficiary | Level 3 | Secured notes
Financial liabilities:
Notes	0	0
Variable Interest Entity, Primary Beneficiary | Carrying Value | Secured notes
Financial liabilities:
Notes	50,881	73,264	$ 100,134
Variable Interest Entity, Primary Beneficiary | Estimated Fair Value | Secured notes
Financial liabilities:
Notes	$ 47,592	$ 68,685	$ 97,712