Collateralized Receivables and Transfers of Financial Assets Collateralized Receivables and Transfers of Financial Assets, Allowance for Collateralized Receivables (Details) - Collateralized Receivables [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ (672)	$ (688)
Allowance for Loan and Lease Losses, Write-offs	617	447
Provision for Loan and Lease Losses	(552)	(431)
Total activity	65	16
Ending balance	$ (607)	$ (672)