Net Investment In Direct Finance Leases (Components Of Net Investment In Direct Finance Leases) (Details) - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Net Investment In Direct Finance Leases [Abstract]
Gross finance lease receivables	[1]	$ 412,489,000	$ 123,563,000
Unearned income	[2]	(135,976,000)	(23,022,000)
Net investment in direct finance leases		276,513,000	100,541,000
Unguaranteed residual value		34,400,000	2,100,000
Executory costs		0	0
Unamortized initial direct costs		$ 0	$ 0

[1] At the inception of the lease, the Company records the total minimum lease payments, executory costs, if any, and unguaranteed residual value as gross finance lease receivables. The gross finance lease receivables are reduced as customer payments are received. There was $34.4 million and $2.1 million unguaranteed residual value at December 31, 2017 and 2016, respectively, included in gross finance lease receivables. There were no executory costs included in gross finance lease receivables as of December 31, 2017 and 2016.

[2] The difference between the gross finance lease receivables and the cost of the equipment or carrying amount at the lease inception is recorded as unearned income. Unearned income, together with initial direct costs, are amortized to income over the lease term so as to produce a constant periodic rate of return. There were no unamortized initial direct costs as of December 31, 2017 and 2016.