Receivables (Aging of Installment Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,104	$ 1,338
0-30 Days Past Due	8	7
31-60 Days Past Due	1	0
61-90 Days Past Due	0	0
90 Days Past Due	7,681	7,574
Total Installment Receivables Past Due	8,794	8,919
U.S.
Financing Receivable, Recorded Investment, Past Due [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
90 Days Past Due	7,580	7,464
Total Installment Receivables Past Due	7,580	7,464
CANADA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,104	1,338
0-30 Days Past Due	8	7
31-60 Days Past Due	1	0
61-90 Days Past Due	0	0
90 Days Past Due	101	110
Total Installment Receivables Past Due	$ 1,214	$ 1,455