Discontinued Operations - Narrative (Details) $ in Thousands	6 Months Ended
Jun. 30, 2018 USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Total real property transfer tax	$ 23,797
Additional real property transfer tax expense	15,874
Real property transfer tax interest	$ 7,923

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://www.xbrl.org/2003/role/presentationRef
-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