Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

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

Subsequent Events - (Details) $ in Thousands, € in Millions			3 Months Ended		9 Months Ended
Subsequent Events - (Details) $ in Thousands, € in Millions	Nov. 08, 2019 EUR (€) property	Nov. 08, 2019 USD ($) property	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Subsequent Event [Line Items]
Impairment charges \| $			$ 6,375	$ 0	$ 6,375	$ 0
Netherlands \| Subsequent Event
Subsequent Event [Line Items]
Number of real estate properties sold \| property	2	2
Proceeds from dispositions of real estate investments, gross	€ 17.1	$ 19,100