Long-Term Debt - Schedule Of Consolidated Secured Leverage Ratio (Details) - Amended and Restated Credit Agreement [Member]	Jun. 30, 2017
December 31, 2017 Through and Including June 30, 2018 [Member]
Debt Instrument [Line Items]
Maximum Consolidated Secured Leverage Ratio	3.00
September 30, 2018 and Each Fiscal Quarter Thereafter [Member]
Debt Instrument [Line Items]
Maximum Consolidated Secured Leverage Ratio	2.50

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.

No definition available.

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