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Debt Obligations, net (Debt Covenants) (Details)	Dec. 31, 2018
Unsecured Debt
Debt Instrument [Line Items]
Unencumbered assets to unsecured indebtedness ratio	1.2
Consolidated fixed charge coverage ratio	1.5
Secured Debt | 2016 Senior Term Loan
Debt Instrument [Line Items]
Collateral coverage ratio	1.25
Secured Debt | 2015 $325 Million Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing base asset value ratio	1.5
Cash flow to fixed charges ratio	1.5

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- Definition

Debt Instrument Covenant Borrowing Base Asset Value Ratio

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- Definition

Debt Instrument, Covenant, Cash Flow To Fixed Charges Ratio

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No definition available.

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- Definition

Represents the multiple of the minimum collateral coverage on outstanding borrowings required under the terms of the debt covenant.

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No definition available.

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- Definition

Debt Instrument, Covenant, Multiple of Minimum Fixed Charges on Outstanding Borrowings

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No definition available.

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- Definition

Represents the minimum ratio of encumbered assets to unsecured indebtedness required under the terms of the debt covenant.

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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