Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 216,093	$ 207,086
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	152,419	148,283
Stock-based compensation	25,616	12,446
Amortization included in interest expense	3,271	3,294
Gain on disposition of assets	(3,012)	(4,364)
Equity in loss (earnings) of investee	555	(627)
Deferred tax benefit	(64)	(345)
Provision for doubtful accounts	1,643	5,558
Decrease (increase) in:
Receivables	(19,034)	(42,589)
Prepaid expenses	(6,665)	(5,453)
Other assets	(10,682)	(4,249)
Increase (decrease) in:
Trade accounts payable	2,628	(1,882)
Accrued expenses	(6,420)	(16,531)
Operating lease liabilities	(25,945)	(30,656)
Other liabilities	36,501	36,902
Net cash provided by (used in) operating activities	366,904	306,873
Cash flows from investing activities:
Acquisitions	(28,192)	(42,122)
Capital expenditures	(52,130)	(93,007)
Proceeds from disposition of assets and investments	3,661	5,120
Net cash (used in) provided by investing activities	(76,661)	(130,009)
Cash flows from financing activities:
Cash used for purchase of treasury stock	(5,341)	(5,946)
Net proceeds from issuance of common stock	11,505	7,692
Principal payments on long-term debt	(197)	(188)
Principal payments on financing leases	(666)	(666)
Payments on revolving credit facility	(213,000)	(110,000)
Proceeds received from revolving credit facility	218,000	198,000
Proceeds received from accounts receivable securitization program	86,200	31,900
Payments on accounts receivable securitization program	(86,200)	(47,000)
Debt issuance costs	(23)	(25)
Distributions to non-controlling interest	(696)	(367)
Dividends/distributions	(266,326)	(255,180)
Net cash used in financing activities	(256,744)	(181,780)
Effect of exchange rate changes in cash and cash equivalents	(172)	76
Net increase (decrease) in cash and cash equivalents	33,327	(4,840)
Cash and cash equivalents at beginning of period	44,605	52,619
Cash and cash equivalents at end of period	77,932	47,779
Supplemental disclosures of cash flow information:
Cash paid for interest	85,653	81,882
Cash paid for foreign, state and federal income taxes	$ 5,205	$ 6,896