Summary of Significant Accounting Policies and New Accounting Pronouncements Charge-off and Nonaccrual Policies and Practices (Details) (Consumer Loan [Member], USD $)	12 Months Ended
	Dec. 31, 2012
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable Value, Broker Price Opinion or Apprasoals, Number of Days	180 days
Loans Receivable, Number of Days Valuation is Determined	90 days
Mortgage Loans on Real Estate, Number of Servicing Platforms	2
Mortgage Loans on Real Estate, Number of Loans Outstanding	66.66%
Mortgage Loans on Real Estate, Amount to Qualify as Payment	$ 10
Mortgage Loans on Real Estate, Percent to Qualify as Payment	50.00%
Loans and Leases Receivable, Write-offs, Delinquent Threshold Period	6 months
Loans and Leases Receivable, Nonaccrual Status, Dilinquent Threshold Period	3 months
Loans and Leases Receivable, Nonaccrual Status, Accrual Status Resumed, Period of Consecutive Payments	3 months
Consumer Other Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and Leases Receivable, Write-offs, Delinquent Threshold Period	6 months
Loans and Leases Receivable, Nonaccrual Status, Dilinquent Threshold Period	3 months
Loans and Leases Receivable, Nonaccrual Status, Accrual Status Resumed, Period of Consecutive Payments	3 months
Consumer Loans Auto Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable, Write Offs Involving Bankruptcy, Number of Days after Notification	60 days
Loans Receivable, Write offs Involving Bankruptcy, Number of Days Delinquent	120 days
Financing Receivable, Number of Days Past Due	60 days
Loans and Leases Receivable, Write-offs, Delinquent Threshold Period	120 days
Loans and Leases Receivable, Nonaccrual Status, Dilinquent Threshold Period	2 months
Loans and Leases Receivable, Write-offs, Collateral Possession, Minimum Duration Period	30 days
Credit Card Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Receivable, Write Offs Involving Bankruptcy, Number of Days after Notification	60 days
Loans Receivable, Write offs Involving Bankruptcy, Number of Days Delinquent	180 days
Loans and Leases Receivable, Write-offs, Delinquent Threshold Period	6 months