Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Net Investment in Sales-type Leases (Schedule of Company's Net Investment in Sales-type Leases) (Details)

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Net Investment in Sales-type Leases (Schedule of Company's Net Investment in Sales-type Leases) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Leases, Capital [Abstract]    
Future minimum lease payments receivable $ 25,910 $ 31,858
Less allowance for doubtful accounts (844) (682)
Net future minimum lease payment receivable 25,066 31,176
Less unearned interest income (1,223) (1,687)
Net investment in sales-type leases $ 23,843 $ 29,489