Accounting Policies And Recent Accounting Pronouncements (Policy)	9 Months Ended
	Sep. 30, 2019
Accounting Policies And Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, Leases (Topic 842) (ASU 2016-02), and subsequently issued amendments thereto, that replaced existing lease accounting guidance. The new standard requires lessors to classify leases as a sales-type, direct financing, or operating lease. A lease is a sales-type lease if any of five criteria are met, each of which indicate that the lease, in effect, transfers control of the underlying asset to the lessee. If none of those five criteria are met, but two additional criteria are both met, indicating that the lessor has transferred substantially all of the risks and benefits of the underlying asset to the lessee and a third-party, the lease is a direct financing lease. All leases that are not sales-type or direct financing leases are operating leases. The new standard also established a right-of-use model (ROU) that requires lessees to recognize an ROU asset and lease liability on the balance sheet for all leases with a term longer than twelve months. The Company adopted ASU 2016-02, as amended, effective January 1, 2019, using the modified retrospective approach and the effective date as the date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. In addition, the Company elected the following practical expedients permitted under the transition guidance within the new standard: (1) the “package of practical expedients,” which does not require the Company to reassess under the new standard its prior conclusions about lease identification, lease classification, and initial direct costs, (2) the short-term lease recognition exemption for its office space leases of twelve months or less, which resulted in the Company not recognizing an ROU asset or lease liability for these leases, and (3) the practical expedient to not separate lease and non-lease components for leases that qualify for the practical expedient. Adoption of the new standard resulted in the recognition of operating lease ROU assets of $3.7 million and operating lease liabilities of $4.1 million as of January 1, 2019. Adoption did not have an impact on the Company’s consolidated statements of operations or cash flows. Except as described above, there were no changes to the Company’s accounting policies during the nine months ended September 30, 2019. See Note 2 to the audited consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on March 5, 2019, for a description of the Company’s significant accounting policies.
Container and Rail Lease Revenue	Container and Rail Lease Revenue The Company recognizes revenue from operating leases of its equipment as earned over the term of the lease. Where minimum lease payments vary over the lease term, revenue is recognized on a straight-line basis over the term of the lease. The Company recognizes revenue on a cash basis for certain railcar leases that are billed on an hourly or mileage basis through a third-party railcar manager. Early termination of the rental contracts subjects the lessee to a penalty, which is included in lease revenue upon such termination. Sales-type and finance lease income, and interest earned on financing receivables are recognized using the effective interest method, which generates a constant rate of interest over the term of the arrangement. Certain leases include one or more options to renew or purchase the leased rental equipment. The exercise of lease renewal or equipment purchase options is at the sole discretion of the customer. Included in lease revenue is revenue consisting primarily of fees charged to the lessee for handling, delivery, and repairs. These activities are considered non-lease components of the contract, which are generally accounted for separately from the lease component, and revenue is recognized as earned in accordance with Accounting Standards Codification (ASC) Topic 606, Revenue Recognition. For certain leases of railcar equipment, the Company is responsible for the repair and maintenance of the railcars throughout the lease term. For such leases, the lease and non-lease component are combined as a single lease component, and revenue is recognized as earned in accordance with ASC Topic 842, Leases. Also included in lease revenue is revenue from management fees earned under equipment management agreements. Management fees are generally calculated as a percentage of the monthly net operating income for an investor’s portfolio and recognized as revenue in the month of service.
Leases	Leases The Company leases office space under operating leases with expiration dates through 2025. The Company determines whether an arrangement constitutes a lease and records lease liabilities and ROU assets on its consolidated balance sheets at lease commencement. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The operating lease ROU assets also include any lease pre-payments made and exclude lease incentives. Certain of the Company’s leases include one or more options to renew, which are included in the lease term only when it is reasonably certain that the Company will exercise that option. The Company’s office space leases often include lease and non-lease components, which are combined and accounted for as a single lease component. For short-term leases, the Company records rent expense in its consolidated statements of operations on a straight-line basis over the lease term and records variable lease payments as incurred.