Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 76,198	$ 92,151
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	73,125	68,627
Stock-based compensation	8,040	1,780
Amortization included in interest expense	1,642	1,471
Gain on disposition of assets	(2,688)	(563)
Equity in earnings of investee	(178)	(746)
Deferred tax benefit	(1,152)	(342)
Provision for doubtful accounts	1,397	(39)
Decrease (increase) in:
Receivables	24,208	14,394
Prepaid expenses	(10,833)	(5,537)
Other assets	(7,523)	(8,265)
(Decrease) increase in:
Trade accounts payable	(1,911)	(1,496)
Accrued expenses	(24,010)	(22,500)
Operating lease liabilities	(40,801)	(30,786)
Other liabilities	13,198	(6,111)
Net cash provided by (used in) operating activities	108,712	102,038
Cash flows from investing activities:
Acquisitions	(13,627)	(55,293)
Capital expenditures	(42,285)	(28,759)
Proceeds from disposition of assets and investments	3,248	710
Net cash (used in) provided by investing activities	(52,664)	(83,342)
Cash flows from financing activities:
Cash used for purchase of treasury stock	(5,947)	(10,446)
Net proceeds from issuance of common stock	4,208	4,897
Principal payments on long-term debt	(93)	(92)
Principal payments on financing leases	(333)	(333)
Payments on revolving credit facility	(20,000)	(50,000)
Proceeds received from revolving credit facility	90,000	165,000
Proceeds received from accounts receivable securitization program	9,800	0
Payments on accounts receivable securitization program	(25,000)	0
Debt issuance costs	(25)	0
Distributions to non-controlling interest	(214)	(46)
Dividends/distributions	(127,551)	(111,693)
Net cash used in financing activities	(75,155)	(2,713)
Effect of exchange rate changes in cash and cash equivalents	10	107
Net (decrease) increase in cash and cash equivalents	(19,097)	16,090
Cash and cash equivalents at beginning of period	52,619	99,788
Cash and cash equivalents at end of period	33,522	115,878
Supplemental disclosures of cash flow information:
Cash paid for interest	39,430	25,378
Cash paid for foreign, state and federal income taxes	$ 3,182	$ 3,716