Investment In and Advances To Unconsolidated Affiliates - Income Statement of Equity Method Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net revenue:
Total net revenue	$ 216.1	$ 195.2	$ 147.3
Operating expense	161.3	152.4	124.0
Operating income	54.8	42.8	23.3
Interest and other expense, net	(6.9)	(6.2)	(5.0)
Net income	$ 47.9	$ 36.6	$ 18.3