Fair Value Measurements - Financial Assets, Temporary Equity, and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014
Level 1 [Member]
Financial assets:
Cash and cash equivalents	$ 138,173	$ 55,325	$ 32,328
Restricted cash	47,909	63,495	27,244
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
Restricted cash, non-current	2,880	5,070	3,309
Non-current consumer loans, net	0	0	0
Total	188,962	123,890	62,881
Temporary equity:
Common Stock, subject to possible redemption	0
Redeemable noncontrolling interest	0	0	0
Total	0
Financial liabilities:
2.125% cash convertible senior notes due 2019	0	0
Total	0	54,178	84,316
Level 1 [Member] | Domestic Line of Credit [Member]
Financial liabilities:
Line of credit			0
Level 1 [Member] | Consumer loans facility due 2019 [Member]
Financial liabilities:
Consumer loans facility	0	54,178	55,842
Level 1 [Member] | Unsecured notes [Member]
Financial liabilities:
Notes	0	0	28,474
Level 1 [Member] | Secured notes [Member]
Financial liabilities:
Notes	0	0	0
Level 1 [Member] | Foreign currency debt [Member]
Financial liabilities:
Debt instrument	0	0	0
Level 2 [Member]
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
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
Redeemable noncontrolling interest	0	0	0
Total	0
Financial liabilities:
2.125% cash convertible senior notes due 2019	195,233	185,738
Total	408,340	335,810	159,965
Level 2 [Member] | Domestic Line of Credit [Member]
Financial liabilities:
Line of credit			83,000
Level 2 [Member] | Consumer loans facility due 2019 [Member]
Financial liabilities:
Consumer loans facility	46,982	0	0
Level 2 [Member] | Unsecured notes [Member]
Financial liabilities:
Notes	18,550	36,837	8,129
Level 2 [Member] | Secured notes [Member]
Financial liabilities:
Notes	25,650	26,144	22,182
Level 2 [Member] | Foreign currency debt [Member]
Financial liabilities:
Debt instrument	24,213	27,185	29,794
Level 3 [Member]
Financial assets:
Cash and cash equivalents	0	0	0
Restricted cash	0	0	0
Pawn loans	127,929	162,444	128,683
Consumer loans, net	56,491	64,631	57,976
Pawn service charges receivable, net	24,909	31,044	24,733
Consumer loan fees and interest receivable, net	13,063	12,647	15,870
Restricted cash, non-current	0	0	0
Non-current consumer loans, net	81,936	86,364	84,658
Total	304,328	357,130	311,920
Temporary equity:
Common Stock, subject to possible redemption	11,049
Redeemable noncontrolling interest	43,048	49,021	51,129
Total	54,097
Financial liabilities:
2.125% cash convertible senior notes due 2019	0	0
Total	0	0	0
Level 3 [Member] | Domestic Line of Credit [Member]
Financial liabilities:
Line of credit			0
Level 3 [Member] | Consumer loans facility due 2019 [Member]
Financial liabilities:
Consumer loans facility	0	0	0
Level 3 [Member] | Unsecured notes [Member]
Financial liabilities:
Notes	0	0	0
Level 3 [Member] | Secured notes [Member]
Financial liabilities:
Notes	0	0	0
Level 3 [Member] | Foreign currency debt [Member]
Financial liabilities:
Debt instrument	0	0	0
Carrying Value [Member]
Financial assets:
Cash and cash equivalents	138,173	55,325	32,328
Restricted cash	47,909	63,495	27,244
Pawn loans	127,929	162,444	128,683
Consumer loans, net	55,529	63,995	57,447
Pawn service charges receivable, net	24,909	31,044	24,733
Consumer loan fees and interest receivable, net	13,063	12,647	15,870
Restricted cash, non-current	2,880	5,070	3,309
Non-current consumer loans, net	79,860	85,004	83,325
Total	490,252	479,024	372,939
Temporary equity:
Common Stock, subject to possible redemption	11,696
Redeemable noncontrolling interest	16,827	22,800	43,717
Total	28,523
Financial liabilities:
2.125% cash convertible senior notes due 2019	189,724	185,693
Total	400,649	391,171	245,268
Carrying Value [Member] | Domestic Line of Credit [Member]
Financial liabilities:
Line of credit			83,000
Carrying Value [Member] | Consumer loans facility due 2019 [Member]
Financial liabilities:
Consumer loans facility	47,826	54,045	55,715
Carrying Value [Member] | Unsecured notes [Member]
Financial liabilities:
Notes	18,350	36,991	38,072
Carrying Value [Member] | Secured notes [Member]
Financial liabilities:
Notes	22,438	26,195	21,682
Carrying Value [Member] | Foreign currency debt [Member]
Financial liabilities:
Debt instrument	22,177	27,185	30,013
Estimated Fair Value [Member]
Financial assets:
Cash and cash equivalents	138,173	55,325	32,328
Restricted cash	47,909	63,495	27,244
Pawn loans	127,929	162,444	128,683
Consumer loans, net	56,491	64,631	57,976
Pawn service charges receivable, net	24,909	31,044	24,733
Consumer loan fees and interest receivable, net	13,063	12,647	15,870
Restricted cash, non-current	2,880	5,070	3,309
Non-current consumer loans, net	81,936	86,364	84,658
Total	493,290	481,020	374,801
Temporary equity:
Common Stock, subject to possible redemption	11,049
Redeemable noncontrolling interest	43,048	49,021	51,129
Total	54,097
Financial liabilities:
2.125% cash convertible senior notes due 2019	195,233	185,738
Total	408,340	389,988	244,281
Estimated Fair Value [Member] | Domestic Line of Credit [Member]
Financial liabilities:
Line of credit			83,000
Estimated Fair Value [Member] | Consumer loans facility due 2019 [Member]
Financial liabilities:
Consumer loans facility	46,982	54,178	55,842
Estimated Fair Value [Member] | Unsecured notes [Member]
Financial liabilities:
Notes	18,550	36,837	36,603
Estimated Fair Value [Member] | Secured notes [Member]
Financial liabilities:
Notes	25,650	26,144	22,182
Estimated Fair Value [Member] | Foreign currency debt [Member]
Financial liabilities:
Debt instrument	24,213	27,185	29,794
Variable Interest Entity, Primary Beneficiary [Member] | Level 1 [Member] | Secured notes [Member]
Financial liabilities:
Notes	0	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Level 2 [Member] | Secured notes [Member]
Financial liabilities:
Notes	97,712	59,906	16,860
Variable Interest Entity, Primary Beneficiary [Member] | Level 3 [Member] | Secured notes [Member]
Financial liabilities:
Notes	0	0	0
Variable Interest Entity, Primary Beneficiary [Member] | Carrying Value [Member] | Secured notes [Member]
Financial liabilities:
Notes	100,134	61,062	16,786
Variable Interest Entity, Primary Beneficiary [Member] | Estimated Fair Value [Member] | Secured notes [Member]
Financial liabilities:
Notes	$ 97,712	$ 59,906	$ 16,860