Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(19))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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(17))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(25))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies (Details) $ in Thousands			3 Months Ended	9 Months Ended
Commitments and Contingencies (Details) $ in Thousands	May 05, 2017 USD ($) a	Jan. 25, 2016 USD ($) a	Feb. 28, 2017 USD ($)	Aug. 31, 2017 USD ($) ft²
Agreement to sell
Commitments and Contingencies
Purchase obligations		$ 7,700
Purchase Option Term		3 months
Agreement Term of Extension		3 years
Agreement Extension Fee			$ 80
Number of acres \| a		280
Obligations For Investments In Real Estate Assets [Member]
Commitments and Contingencies
Purchase obligations				$ 3,712
Area Of Building \| ft²				137,000
East Granby And Windsor Ct Site [Member] \| Agreement to sell
Commitments and Contingencies
Purchase Option Term	3 months
Number of acres to be sold \| a	288
Sale price	$ 7,800