Receivables Aging of Installment Receivables (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 1,235	$ 1,338
0-30 Days Past Due	4	7
31-60 Days Past Due	5	0
61-90 Days Past Due	0	0
Greater than 90 Days Past Due	8,044	7,574
Total Installment Receivables Past Due	9,288	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	7,918	7,464
Total Installment Receivables Past Due	7,918	7,464
CANADA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,235	1,338
0-30 Days Past Due	4	7
31-60 Days Past Due	5	0
61-90 Days Past Due	0	0
Greater than 90 Days Past Due	126	110
Total Installment Receivables Past Due	$ 1,370	$ 1,455