Collateralized Receivables and Transfers of Financial Assets, Repurchase price percentage (Details) - Collateralized Receivables [Member]	12 Months Ended
	Dec. 31, 2016
Less than or equal to 15 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Repurchase Percentage	100.00%
Greater than 15 but less than 64 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Repurchase Percentage	90.00%
Equal to or greater than 64 but less than 120 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Repurchase Percentage	65.00%
120 or more [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable, Repurchase Percentage	50.00%