Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes
Reclassification into deferred tax asset, non current	$ 17.9	$ 15.7
Valuation allowances attributable to state net operating loss carryforwards and other state deferred tax assets of Central Parking	7.0	6.8
Change in valuation allowance	0.2	5.5	$ 9.1
Taxes paid for United States federal, state and foreign income taxes	17.6	18.1	$ 1.3
State
Income Taxes
Operating loss carryforwards, amount	18.6
Canada
Income Taxes
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements	2.9
Tax that may be payable on distribution of foreign subsidiary earnings to the United States	1.1
Puerto Rico
Income Taxes
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements	6.2
Tax that may be payable on distribution of foreign subsidiary earnings to the United States	$ 2.7
Accounting Standards Update 2015-07 | New Accounting Pronouncement, Early Adoption, Effect
Income Taxes
Current deferred tax asset reclassification		12.3
Reclassification into deferred tax asset, non current		$ 12.3