Debt - Certain Covenants (Details) - Amended And Restated Credit Agreement	3 Months Ended
	Sep. 30, 2015	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt to Consolidated EBITDA ratio		234.00%	279.00%
Debt Instrument, Covenant, Period One
Debt Instrument [Line Items]
Required minimum Debt to Consolidated EBITDA ratio	5.30
Debt Instrument, Covenant, Period Two
Debt Instrument [Line Items]
Required minimum Debt to Consolidated EBITDA ratio	4.50
Debt Instrument, Covenant, Period Three
Debt Instrument [Line Items]
Required minimum Debt to Consolidated EBITDA ratio	3.5