Variable Interest Entities - Transfers of Payroll Loans (Details) - Grupo Finmart [Member] - Payroll Loans [Member] $ in Millions	Sep. 30, 2014 USD ($) loan	Jun. 30, 2014 USD ($) loan	Mar. 31, 2014 USD ($) loan	Oct. 31, 2013 USD ($) loan
VIE C [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of payroll loans transferred | loan				14,500
Carrying (Par) Value of Principal of Loans Transferred				$ 14.0
Carrying Value of Accrued Interest of Loans Transferred				0.7
Principal of VIE Promissory Note Issued at Par				$ 19.3
VIE B [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of payroll loans transferred | loan	16,135	7,100	7,500
Carrying (Par) Value of Principal of Loans Transferred	$ 26.7	$ 10.0	$ 10.0
Carrying Value of Accrued Interest of Loans Transferred	3.3	2.1	1.3
Principal of VIE Promissory Note Issued at Par	$ 43.8	$ 16.5	$ 16.0
VIE A [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of payroll loans transferred | loan		8,500
Carrying (Par) Value of Principal of Loans Transferred		$ 14.0
Carrying Value of Accrued Interest of Loans Transferred		2.3
Principal of VIE Promissory Note Issued at Par		$ 21.8