Commitments and Contingencies - Summary of Asset Retirement Obligations (Details) - USD ($) $ in Thousands	3 Months Ended	8 Months Ended
Aug. 31, 2015	Aug. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Balance at the beginning of the period	$ 3,868
ARO assumed in acquisition	2,130	$ 2,130
Liabilities incurred during period	2,452	6,320
Balance at the end of the period	$ 8,450	$ 8,450

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Asset Retirement Obligation

-URI http://asc.fasb.org/extlink&oid=6505190

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