Contingent Liabilities (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2009	Dec. 31, 2014
Loss Contingencies [Line Items]
Aggregate amount of counterparty obligations	$ 7,229,000			$ 7,237,000
VSC counterparty contingency expense	29,000	68,000
Loss reimbursement on sold loans			60,000
Provision for loss reimbursement on sold loans	(69,000)	(481,000)
Reserve For Loss Reimbursement On Sold Loans				700,000
Pending Litigation [Member]
Loss Contingencies [Line Items]
Maximum range of reasonably possible loss	$ 500,000
Accounts Receivables Due to Mepco [Member]
Loss Contingencies [Line Items]
Installment payments period for service contract, minimum	12 months
Installment payments period for service contract, maximum	24 months