Loans to Bank Customers Impaired Financing Receivable (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	$ 109
Carrying value	99
Related allowance	28
Average carrying value	82
Interest income recognized	7
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	161
Carrying value	53
Related allowance	1
Average carrying value	51
Interest income recognized	0
Installment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	385
Carrying value	192
Related allowance	27
Average carrying value	178
Interest income recognized	51
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	109
Carrying value	99
Related allowance	28
Average carrying value	82
Interest income recognized	7
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	20
Carrying value	20
Related allowance	1
Average carrying value	14
Interest income recognized	0
Installment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	306
Carrying value	156
Related allowance	27
Average carrying value	126
Interest income recognized	40
Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	0
Carrying value	0
Average carrying value	0
Interest income recognized	0
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	141
Carrying value	33
Average carrying value	37
Interest income recognized	0
Installment [Member]
Financing Receivable, Impaired [Line Items]
Unpaid principal balance	79
Carrying value	36
Average carrying value	52
Interest income recognized	$ 11