Mortgage Notes Receivable - Narrative (Details) $ in Thousands	9 Months Ended
Sep. 30, 2017 USD ($) loan	Dec. 31, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage notes receivable	8
Mortgage notes receivable, net \| $	$ 20,510	$ 22,764
Mortgage notes receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage notes receivable	8
Weighted-average interest rate	6.20%
Weighted-average years to maturity	12 years 10 months 24 days
Mortgage notes receivable, net \| $	$ 20,510	$ 1,500
Number of mortgage notes with capitalized principal and interest	1

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant