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Net Investment in Sales-Type Leases - Credit Losses and Recorded Investment in Sales-Type Leases (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Net Investment in Sales-Type Leases [Abstract]            
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment $ 151   $ 167      
Financing Receivable Gross - collectively evalauated for impairment 16,539   16,884      
Financing Receivable, Collectively Evaluated for Impairment 16,388   16,717      
Financing Receivable, Allowance for Credit Losses 151 157 167 174 184 607
Financing Receivable, Gross 16,539   16,884      
Financing Receivable, Net $ 16,388   $ 16,717