Receivables (Installment Receivables by Class) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Total Installment Receivables
Non-Impaired installment receivables with no related allowance recorded	$ 1,077	$ 1,008
Impaired installment receivables with a related allowance recorded	6,653	6,801
Total installment receivables	7,730	7,809
Unpaid Principal Balance
Non-Impaired installment receivables with no related allowance recorded	1,018	962
Impaired installment receivables with a related allowance recorded	6,653	6,801
Total installment receivables	7,671	7,763
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	5,548	5,852
Interest Income Recognized
Non-Impaired installment receivables with no related allowance recorded	23	82
Impaired installment receivables with a related allowance recorded	0	0
Total installment receivables	23	82
U.S.
Total Installment Receivables
Impaired installment receivables with a related allowance recorded	6,513	6,735
Unpaid Principal Balance
Impaired installment receivables with a related allowance recorded	6,513	6,735
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	5,408	5,786
Interest Income Recognized
Impaired installment receivables with a related allowance recorded	0	0
CANADA
Total Installment Receivables
Non-Impaired installment receivables with no related allowance recorded	1,077	1,008
Impaired installment receivables with a related allowance recorded	140	66
Total installment receivables	1,217	1,074
Unpaid Principal Balance
Non-Impaired installment receivables with no related allowance recorded	1,018	962
Impaired installment receivables with a related allowance recorded	140	66
Total installment receivables	1,158	1,028
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	140	66
Interest Income Recognized
Non-Impaired installment receivables with no related allowance recorded	23	82
Impaired installment receivables with a related allowance recorded	0	0
Total installment receivables	$ 23	$ 82