XML 60 R43.htm IDEA: XBRL DOCUMENT v3.7.0.1

Comparative Information	12 Months Ended
	Dec. 31, 2016
Comparative Information [Abstract]
COMPARATIVE INFORMATION	34. COMPARATIVE INFORMATION These financial statements contain certain reclassifications of prior period amounts to be consistent with the current period presentation, with no effect on net income.

X

- References

No definition available.

+ Details

Name:	ema_ComparativeInformationAbstract
Namespace Prefix:	ema_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure for classifying current financial statements, which may be different from classifications in the prior year's financial statements. Disclose any material changes in classification including an explanation of the reason for the change and the areas impacted.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6359566&loc=d3e326-107755

+ Details

Name:	us-gaap_Reclassifications
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration