Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	3 Months Ended
Mar. 31, 2018 USD ($)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Real Estate Taxes	$ 1,886

A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35301-107843

Name:	us-gaap_RealEstateTaxExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration