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Significant Accounting Policies - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025 USD ($) Customer	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) Customer
Summary Of Significant Accounting Principles And Policies [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 184.6
Revenue remaining performance obligation in the next twelve months	71.7
Interest Rate Swap [Member]
Summary Of Significant Accounting Principles And Policies [Line Items]
Notional amount	675.0
Parking Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Deferred Revenue	18.1		$ 21.7
Contract with Customer, Revenue Recognized	10.0	$ 8.6
Government Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Deferred Revenue	12.1		$ 11.8
Contract with Customer, Revenue Recognized	$ 4.3	$ 3.0
Customer Concentration Risk | Sales Revenue Net | Government Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	10.00%
Concentration Risk, Percentage	10.00%
Customer Concentration Risk | Sales Revenue Net | Parking Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Number of customers exceeds 10% | Customer	0		0
Customer Concentration Risk | Sales Revenue Net | City of New York Department of Transportation
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	15.40%	16.60%
Concentration Risk, Percentage	15.40%	16.60%
Customer Concentration Risk | Sales Revenue Net | Commercial Services | Government Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	10.00%
Concentration Risk, Percentage	10.00%
Customer Concentration Risk | Sales Revenue Net | Commercial Services Customer A
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	15.70%	13.10%
Concentration Risk, Percentage	15.70%	13.10%
Customer Concentration Risk | Sales Revenue Net | Commercial Services Customer B
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage		11.50%
Concentration Risk, Percentage		11.50%
Customer Concentration Risk | Sales Revenue Net | Commercial Services Customer B | Government Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	11.90%
Concentration Risk, Percentage	11.90%
Customer Concentration Risk | Sales Revenue Net | Commercial Services Customer C
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	10.30%	11.80%
Concentration Risk, Percentage	10.30%	11.80%
Customer Concentration Risk | Sales Revenue Net | Minimum
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	10.00%
Concentration Risk, Percentage	10.00%
Customer Concentration Risk | Accounts Receivable | Parking Solutions
Summary Of Significant Accounting Principles And Policies [Line Items]
Number of customers exceeds 10% | Customer	0		0
Customer Concentration Risk | Accounts Receivable | City of New York Department of Transportation
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	16.70%		17.20%
Concentration Risk, Percentage	16.70%		17.20%
Customer Concentration Risk | Accounts Receivable | Commercial Services
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage			10.00%
Concentration Risk, Percentage			10.00%
Number of customers exceeds 10% | Customer			0
Customer Concentration Risk | Accounts Receivable | Commercial Services Customer A
Summary Of Significant Accounting Principles And Policies [Line Items]
Concentration risk percentage	10.30%
Concentration Risk, Percentage	10.30%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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