Notes Payable and Other Debt - Summary of the Scheduled Maturities (Parenthetical) (Details)	9 Months Ended
Sep. 30, 2018
Pinecone
Debt Instrument [Line Items]
Line of credit facility, maturity date	Aug. 15, 2020

Date the credit facility terminates, in CCYY-MM-DD format.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration