Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets
Net operating loss carry forwards	$ 19.3	$ 20.6
Accrued expenses	30.7	34.1
Accrued compensation	12.8	12.1
Book over tax cost unfavorable acquired lease contracts	16.1	20.6
Other	1.2	0.7
Total gross deferred tax assets	80.1	88.1
Less: valuation allowance	(6.6)	(6.8)
Total deferred tax assets	73.5	81.3
Deferred tax liabilities
Prepaid expenses	(0.4)	(0.4)
Undistributed foreign earnings	(0.9)	(1.0)
Tax over book depreciation and amortization	(6.4)	(11.0)
Tax over book goodwill amortization	(28.0)	(28.7)
Tax over book cost favorable acquired lease contracts	(11.9)	(15.6)
Equity investments in unconsolidated entities	(8.0)	(8.8)
Other	0.0	(0.1)
Total deferred tax liabilities	(55.6)	(65.6)
Net deferred tax asset	$ 17.9	$ 15.7