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Related Party Transactions (Details) - USD ($)						12 Months Ended
Related Party Transactions (Details) - USD ($)	Sep. 21, 2016	Sep. 07, 2016	Jun. 17, 2016	Jun. 13, 2016	Jul. 01, 2010	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2014	Dec. 31, 2011
Related party transactions
Term of lease						20 years
Membership units
Non-cash distribution declared							$ 38,838,000
Cash distribution declared								$ 230,777,000
Cash distribution to members	$ 100,000,000					$ 149,633,000	236,146,000	228,894,000
AutoMatch Distribution
Membership units
Distribution declared				$ 42,700,000
Non-cash distribution declared				38,800,000
Cash distribution declared				$ 3,800,000
Cash distribution to members		$ 200,000	$ 3,600,000
FreedomRoads \| AutoMatch Distribution
Membership units
Cash distribution declared		1,600,000
Cash distribution to members		$ 1,600,000
Monitoring Agreement \| Crestview Advisors, L.L.C. and Stephen Adams
Related party transactions
Related party expense							1,700,000	2,000,000
Monitoring Agreement \| Crestview Advisors, L.L.C
Related party transactions
Annual monitoring fee							1,000,000
Quarterly installments							250,000
Monitoring Agreement \| Stephen Adams
Related party transactions
Annual monitoring fee							1,000,000
Quarterly installments							250,000
Reimbursable Fees \| Crestview Advisors, L.L.C. and Stephen Adams
Related party transactions
Related party expense							200,000	500,000
Reimbursable Fees \| Crestview Advisors, L.L.C
Related party transactions
Managers' reimbursable expenses per annum per related party							250,000
Reimbursable Fees \| Stephen Adams
Related party transactions
Managers' reimbursable expenses per annum per related party							250,000
Related Party Agreement \| eNET IT Group
Related party transactions
Related party expense							100,000	600,000
Related Party Agreement \| Precise Graphix
Related party transactions
Related party expense						2,700,000	3,300,000
Aircraft Agreement \| Stephen Adams
Related party transactions
Related party expense								1,000,000
Put Agreement \| Mr. Lemonis
Related party transactions
Pledged profit units									$ 12,000,000
Number of profits units									4,667
Advertising Agreement \| Stephen Adams
Related party transactions
Non-cash distribution								1,000,000
Deposit made					$ 1,000,000
Advertising Agreement \| Cumulus Media
Related party transactions
Related party expense						$ 400,000	$ 0	600,000
Precise Graphix \| Related Party Agreement
Related party transactions
Related party expense								$ 1,700,000
Mr. Lemonis \| eNET IT Group
Related party transactions
Economic interest (as a percent)							51.00%
Mr. Lemonis \| Precise Graphix \| Mr. Lemonis
Related party transactions
Economic interest (as a percent)						33.00%
Stephen Adams \| AGI Holding Corp \| Aircraft Agreement
Related party transactions
Economic interest (as a percent)								100.00%
FreedomRoads \| Related Party Agreement \| Stephen Adams
Related party transactions
Due to Related Parties										$ 900,000
FreedomRoads \| Lease Agreement \| Managers and Officers
Related party transactions
Related party expense						$ 2,000,000	$ 1,200,000	$ 2,000,000
FreedomRoads \| Lease Agreement \| Mr. Lemonis \| Original Lease
Related party transactions
Term of lease						132 months
Base rent						$ 29,000
FreedomRoads \| Lease Agreement \| Mr. Lemonis \| Expansion Lease
Related party transactions
Term of lease						132 months
Base rent						$ 2,500
AutoMatch \| Transition Services Agreement \| FreedomRoads
Related party transactions
Agreement period				120 days