Receivables Aging of Installment Receivables (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 1,242	$ 1,338
0-30 Days Past Due	9	7
31-60 Days Past Due	11	0
61-90 Days Past Due	1	0
Greater than 90 Days Past Due	8,118	7,574
Total Installment Receivables Past Due	9,381	8,919
U.S.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	0	0
0-30 Days Past Due	0	0
31-60 Days Past Due	0	0
61-90 Days Past Due	0	0
Greater than 90 Days Past Due	8,014	7,464
Total Installment Receivables Past Due	8,014	7,464
CANADA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,242	1,338
0-30 Days Past Due	9	7
31-60 Days Past Due	11	0
61-90 Days Past Due	1	0
Greater than 90 Days Past Due	104	110
Total Installment Receivables Past Due	$ 1,367	$ 1,455