Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Deferred tax liabilities, net	$ 4.8	$ 4.8
Deferred income tax expense (benefit), federal	5.2	4.8
Deferred income tax expense (benefit), state taxes		0.0	$ 0.0
Provision for income taxes	$ 0.0	$ 0.0