Receivables (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Installment Receivables	$ 8,919	$ 6,488
Installment Receivables, Net of Unearned Interest	8,858	6,417
Allowance for doubtful accounts	(6,039)	(3,823)
Installment receivables, net	1,562	2,188
Installment receivables, net, long-term	1,257	406
Installment Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Installment Receivables, Current	3,242	4,982
Installment Receivables, Long-Term	5,677	1,506
Total Installment Receivables	8,919	6,488
Unearned Interest, Current	(61)	(71)
Unearned Interest, Noncurrent	0	0
Total Unearned Interest	(61)	(71)
Installment Receivables Net of Unearned Interest Current	3,181	4,911
Installment Receivables Net of Unearned Interest Noncurrent	5,677	1,506
Installment Receivables, Net of Unearned Interest	8,858	6,417
Allowance for doubtful accounts, current	(1,619)	(2,723)
Allowance for doubtful accounts, long-term	(4,420)	(1,100)
Allowance for doubtful accounts	(6,039)	(3,823)	(4,273)
Installment receivables, net	1,562	2,188
Installment receivables, net, long-term	1,257	406
Installment receivables, net	$ 2,819	$ 2,594