Receivables (Aging of Installment Receivables) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,038	$ 976
1-29 Days Past Due	2	15
30-59 Days Past Due	0	2
60-89 Days Past Due	0	0
90 Days Past Due	6,690	6,816
Total Installment Receivables Past Due	7,730	7,809
U.S.
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	0	0
1-29 Days Past Due	0	0
30-59 Days Past Due	0	0
60-89 Days Past Due	0	0
90 Days Past Due	6,513	6,735
Total Installment Receivables Past Due	6,513	6,735
CANADA
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,038	976
1-29 Days Past Due	2	15
30-59 Days Past Due	0	2
60-89 Days Past Due	0	0
90 Days Past Due	177	81
Total Installment Receivables Past Due	$ 1,217	$ 1,074