CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net income	$ 55.9	$ 49.3
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of property and equipment	13.8	12.5
Amortization of operating lease right-of-use assets	7.6	7.3
Amortization of intangibles	10.7	11.4
Amortization of deferred financing costs and debt discount	0.4	0.5
Provision for credit losses	1.4	1.7
Write-off of debt issuance costs	1.1	0.0
Gain on sale of property and equipment	(0.4)	(0.6)
Noncash stock compensation	4.0	3.4
Other, net	(3.4)	(2.5)
Changes in assets and liabilities, excluding effects of acquisitions
Accounts receivable	(3.6)	1.7
Inventories	(8.0)	7.7
Other assets	4.0	4.4
Accounts payable	(1.4)	(16.9)
Income taxes receivable/payable	19.7	16.5
Other liabilities	(17.0)	(22.6)
Net cash provided by operating activities	84.8	73.8
Cash flows from investing activities
Purchases of property and equipment	(21.8)	(14.9)
Acquisitions of businesses, net of cash acquired of $— in 2024 and 2023, respectively	(4.1)	(38.0)
Proceeds from sale of property and equipment	0.7	0.7
Settlements with interest rate swap counterparties	4.5	3.6
Other	(0.4)	1.0
Net cash used in investing activities	(21.1)	(47.6)
Cash flows from financing activities
Proceeds from Term Loan	142.9	0.0
Payments on Term Loan	(133.0)	(1.3)
Proceeds from vehicle and equipment notes payable	5.2	8.1
Debt issuance costs	(1.5)	0.0
Principal payments on long-term debt	(7.5)	(7.0)
Principal payments on finance lease obligations	(0.8)	(0.7)
Dividends paid	(54.9)	(34.5)
Acquisition-related obligations	(0.5)	(1.7)
Surrender of common stock awards by employees	(0.2)	0.0
Net cash used in financing activities	(50.3)	(37.1)
Net change in cash and cash equivalents	13.4	(10.9)
Cash and cash equivalents at beginning of period	386.5	229.6
Cash and cash equivalents at end of period	399.9	218.7
Supplemental disclosures of cash flow information
Interest	15.5	14.7
Income taxes, net of refunds	0.8	1.5
Supplemental disclosure of noncash activities
Right-of-use assets obtained in exchange for operating lease obligations	8.8	5.7
Property and equipment obtained in exchange for finance lease obligations	1.2	1.0
Seller obligations in connection with acquisition of businesses	0.6	6.0
Unpaid purchases of property and equipment included in accounts payable	$ 2.8	$ 2.3