For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Related Party Transactions (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Dec. 18, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Apr. 29, 2016
Related Party Transactions
Contribution from Parent				$ 20.3	$ 50.0
Repurchase of management units				8.8
Avista Capital Partners ("Avista") and Crestview, majority owners of former Parent
Related Party Transactions
Quarterly management fees base rate				0.4
Percentage of management fees	50.00%
Payment of management fees		$ 0.0	$ 0.4	1.0	$ 1.3
Former Parent and Members
Related Party Transactions
Receivable from parent and members		$ 0.0		0.0		$ 0.3
Former parent of the reporting entity \| Crestview Entities Purchase Agreement
Related Party Transactions
Contribution from Parent				143.3
Former parent of the reporting entity \| Purchase of units from former employees
Related Party Transactions
Repurchase of management units				$ 8.8
Avista Capital Partners ("Avista") and Crestview, majority owners of former Parent \| Former parent of the reporting entity
Related Party Transactions
Additional investment in newly-issued membership units							$ 40.0
Crestview Partners III GP, L. P. \| Former parent of the reporting entity \| Crestview Entities Purchase Agreement
Related Party Transactions
Primary investment made in newly-issued units	$ 125.0
Percentage of beneficial ownership acquired	35.00%
Class A units \| Former parent of the reporting entity \| Purchase of units from former employees
Related Party Transactions
Repurchase of old management units (in units)				415,494
Class B units \| Former parent of the reporting entity \| Purchase of units from former employees
Related Party Transactions
Repurchase of old management units (in units)				243,270