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Net Investment in Sales-Type Leases - Long Term Net Investment in Sales Type Leases (Details) - USD ($)
6 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Leases [Abstract]    
Terms of sales-type leases (generally up to five years in length) 5 years  
Net minimum lease payments to be received $ 16,674,000 $ 17,616,000
Less: unearned interest income portion (1,118,000) (1,131,000)
Net investment in sales-type leases 15,556,000 16,485,000
Less: short-term portion (5,348,000) (5,637,000)
Long-term net investment in sales-type leases 10,208,000 10,848,000
Collective allowance for credit losses $ 0 $ 200,000