CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net income	$ 189.7	$ 178.9
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization of property and equipment	43.1	38.7
Amortization of operating lease right-of-use assets	24.4	21.7
Amortization of intangibles	31.7	33.7
Amortization of deferred financing costs and debt discount	1.2	1.4
Provision for credit losses	4.9	4.4
Write-off of debt issuance costs	1.1	0.9
Gain on sale of property and equipment	(1.6)	(1.5)
Non-cash stock compensation	13.2	10.6
Asset impairment	4.9	0.0
Other, net	(10.3)	(8.8)
Changes in assets and liabilities, excluding effects of acquisitions
Accounts receivable	(31.5)	(28.7)
Inventories	(16.4)	18.7
Other assets	5.3	10.7
Accounts payable	7.5	(8.3)
Income taxes receivable/payable	4.6	(0.2)
Other liabilities	(6.6)	(21.7)
Net cash provided by operating activities	265.2	250.5
Cash flows from investing activities
Purchases of property and equipment	(66.7)	(46.9)
Acquisitions of businesses, net of cash acquired of $— in 2024 and 2023, respectively	(41.9)	(44.8)
Proceeds from sale of property and equipment	2.4	2.1
Settlements with interest rate swap counterparties	13.6	12.2
Other	(1.8)	(0.5)
Net cash used in investing activities	(94.4)	(77.9)
Cash flows from financing activities
Proceeds from Term Loan	142.9	0.0
Payments on Term Loan	(135.5)	(3.7)
Proceeds from vehicle and equipment notes payable	18.8	28.4
Debt issuance costs	(1.5)	(0.4)
Principal payments on long-term debt	(22.7)	(22.2)
Principal payments on finance lease obligations	(2.2)	(2.2)
Dividends paid	(75.0)	(53.8)
Acquisition-related obligations	(1.5)	(2.7)
Repurchase of common stock	(66.4)	0.0
Surrender of common stock awards by employees	(8.0)	(5.8)
Net cash used in financing activities	(151.1)	(62.4)
Net change in cash and cash equivalents	19.7	110.2
Cash and cash equivalents at beginning of period	386.5	229.6
Cash and cash equivalents at end of period	406.2	339.8
Supplemental disclosures of cash flow information
Interest	37.0	36.3
Income taxes, net of refunds	62.8	64.2
Supplemental disclosure of non-cash activities
Right-of-use assets obtained in exchange for operating lease obligations	31.5	23.2
Property and equipment obtained in exchange for finance lease obligations	1.9	2.9
Seller obligations in connection with acquisition of businesses	3.8	8.3
Unpaid purchases of property and equipment included in accounts payable	5.5	1.9
Accrued excise tax on common stock repurchases	$ 0.5	$ 0.0