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

Net Investment in Sales-type Leases (Schedule of Future Minimum Lease Payments) (Details)

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Net Investment in Sales-type Leases (Schedule of Future Minimum Lease Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Net Investment in Sales-type Leases [Abstract]  
2015 $ 9,325us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableCurrent
2016 6,960us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInTwoYears
2017 5,031us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears
2018 2,752us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInFourYears
2019 and thereafter 862us-gaap_CapitalLeasesFutureMinimumPaymentsReceivableInFiveYears
Capital Leases Future Minimum Payments Receivable $ 24,930us-gaap_CapitalLeasesFutureMinimumPaymentsReceivable