Receivables Aging of Installment Receivables (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	$ 1,338	$ 1,467
0-30 Days Past Due	7	43
31-60 Days Past Due	0	2
61-90 Days Past Due	0	0
Greater than 90 Days Past Due	7,574	4,976
Total Installment Receivables Past Due	8,919	6,488
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	7,464	4,508
Total Installment Receivables Past Due	7,464	4,508
CANADA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current	1,338	1,467
0-30 Days Past Due	7	43
31-60 Days Past Due	0	2
61-90 Days Past Due	0	0
Greater than 90 Days Past Due	110	468
Total Installment Receivables Past Due	$ 1,455	$ 1,980