Equity-Based Compensation Equity-Based Compensation (Summary of Unvested Restricted Stock Activity) (Details) - Restricted Stock - $ / shares	3 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Shares of Common Stock
Beginning balance (in shares)	9,088	136,234
Ending balance (in shares)			136,234
Restricted Share Plan
Number of Shares of Common Stock
Beginning balance (in shares)		136,234	15,708	9,367
Granted (in shares)	127,402	34,588	127,402	8,897
Vested (in shares)		(59,401)	(6,869)	(2,556)
Forfeited (in shares)		0	(7)
Ending balance (in shares)		111,421	136,234	15,708
Weighted-Average Issue Price
Beginning balance (in dollars per share)		$ 16.51	$ 23.67	$ 23.70
Granted (in dollars per share)		9.83	16.01	23.59
Vested (in dollars per share)		16.36	23.58	23.47
Forfeited (in dollars per share)		0	0
Ending balance (in dollars per share)		$ 14.52	$ 16.51	$ 23.67

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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