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Fair Value Of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net investment in direct finance leases	$ 323	$ 156
Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net investment in direct finance leases	102,600
Capital lease obligations	100
Collateralized Financing Obligations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Collateralized financing obligations	135,300
Collateralized Financing Obligations [Member] \| Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of collateralized financing obligations	134,600
Revolving Credit Facility [Member] \| Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of revolving credit facility	508,000
Term Loan [Member] \| Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of term loan	284,000
Term Loan [Member] \| Variable Interest Entity, Primary Beneficiary [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Collateralized financing obligations	8,900
Term Loan [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of term loan	8,900
Senior Notes [Member] \| Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of notes	82,400
Asset-Backed Notes [Member] \| Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of notes	$ 302,900