Statement of Cash Flows - Real Property Capitalized (Details) $ in Millions		3 Months Ended			12 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Feb. 15, 2011 USD ($)
Right to Use Assets and Liabilities
Distribution of prepaid marketing deposit						$ 1.0
Number of leases met the requirements to be reported as operating leases | item				30
Right to use assets derecognized		$ 4.6	$ 15.4	$ 122.4	$ 20.1	5.4	$ 8.2
Right to use assets capitalized						50.6	35.9
Right to use liabilities recorded						50.6	$ 35.9
Derecognition resulted in deferred gain				$ 4.6	$ 0.1	4.6
Series B Notes | Securities purchase agreement
Right to Use Assets and Liabilities
Amount of debt converted to equity	$ 70.0
Unamortized premium	$ 3.4							$ 11.9
CWGS Enterprises, LLC and Subsidiaries
Right to Use Assets and Liabilities
Non-cash distribution declared, accounts receivable						$ 0.9