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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenue Recognition [Abstract]
Unrecognized tax benefits	$ 0	$ 0
Minimum | Buildings, Land Improvements, and Building Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)	5 years
Minimum | Furniture, Fixtures and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)	1 year
Maximum | Buildings, Land Improvements, and Building Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)	40 years
Maximum | Furniture, Fixtures and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life (in years)	10 years
Accounting Standards Update 2015-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets (liabilities), net		$ 18,600,000

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- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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