Receivables Narrative (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Doubtful Accounts Receivable	$ 16,912,000	$ 17,715,000
Number of Missed Payments before Delinquent	3
Typical Financing Period	12 months
Credit amount requiring additional analysis	250,000
Average Period of Adjudication	18 months
Installment receivable purchased from DLL	$ 1,212,000