Receivables Installment Receivables by Class (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	$ 9,381	$ 8,919
Unpaid Principal Balance	9,321	8,858
Related Allowance for Doubtful Accounts	6,221	6,039
Interest Income Recognized	20	101
CANADA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	1,367	1,455
Unpaid Principal Balance	1,307	1,394
Related Allowance for Doubtful Accounts	85	88
Interest Income Recognized	20	101
Impaired Installment Receivables with Related Allowance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	8,099	7,552
Unpaid Principal Balance	8,099	7,552
Related Allowance for Doubtful Accounts	6,221	6,039
Interest Income Recognized	0	0
Impaired Installment Receivables with Related Allowance [Member] | U.S.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	8,014	7,464
Unpaid Principal Balance	8,014	7,464
Related Allowance for Doubtful Accounts	6,136	5,951
Interest Income Recognized	0	0
Impaired Installment Receivables with Related Allowance [Member] | CANADA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	85	88
Unpaid Principal Balance	85	88
Related Allowance for Doubtful Accounts	85	88
Interest Income Recognized	0	0
Installment Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	1,282	1,367
Unpaid Principal Balance	1,222	1,306
Related Allowance for Doubtful Accounts	0	0
Interest Income Recognized	20	101
Installment Receivables [Member] | CANADA
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	1,282	1,367
Unpaid Principal Balance	1,222	1,306
Related Allowance for Doubtful Accounts	0	0
Interest Income Recognized	$ 20	$ 101