Acquisitions and Dispositions Acquisitions and Dispositions (Details)	Jul. 15, 2014 a
Business Combinations [Abstract]
Acreage Sold in Oil and Gas Properties	8,300
Participation Interest Sold in Oil and Gas Properties	36.00%

Participation Interest Sold in Oil and Gas Properties

No definition available.

Name:	sfy_ParticipationInterestSoldinOilandGasProperties
Namespace Prefix:	sfy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant