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Commitments and Contingencies (Details)	Mar. 31, 2018 Lawsuit
Loss Contingencies [Line Items]
Number of lawsuits filed	7
Cases with SPTC as Defendant [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	4
Claims for Violations of Louisiana Racketeering Act [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	2
Cases Remaining in Parish Of East Baton Rouge Granted Indefinite Extensions to Respond [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	2
Cases Filed in East Baton Rouge [Member]
Loss Contingencies [Line Items]
Number of lawsuits filed	2

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

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