CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
OPERATING ACTIVITIES
Net income	$ 111,726	$ 172,030
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	64,804	63,690
Amortization of intangibles	6,398	6,463
Share-based compensation expense	5,585	6,641
Provision for losses on accounts receivable	2,257	3,583
Change in deferred income taxes	(8,228)	(6,371)
(Gain) loss on sale of property and equipment	1,188	(4,073)
Gain on sale of subsidiary		(402)
Pre-tax gain on sale of discontinued operations	(70,215)
Change in fair value of contingent consideration	5,040	810
Change in fair value of equity investment	(3,739)
Changes in operating assets and liabilities:
Receivables	83,542	(87,092)
Prepaid expenses	6,353	7,477
Other assets	759	72
Income taxes	(35,968)	4,211
Operating right-of-use assets and lease liabilities, net	3,059	114
Accounts payable, accrued expenses, and other liabilities	(68,804)	17,470
NET CASH PROVIDED BY OPERATING ACTIVITIES	103,757	184,623
INVESTING ACTIVITIES
Purchases of property, plant and equipment, net of financings	(83,171)	(49,682)
Proceeds from sale of property and equipment	2,853	9,115
Proceeds from sale of discontinued operations	100,949
Business acquisition, net of cash acquired		2,279
Proceeds from the sale of subsidiary		475
Purchases of short-term investments	(46,858)	(64,330)
Proceeds from sale of short-term investments	63,693	35,840
Capitalization of internally developed software	(7,010)	(8,541)
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	30,456	(74,844)
FINANCING ACTIVITIES
Borrowings under credit facilities		58,000
Proceeds from notes payable		7,280
Payments on long-term debt	(35,114)	(84,905)
Net change in book overdrafts	(13,171)	6,085
Deferred financing costs	57
Payment of common stock dividends	(5,809)	(4,927)
Purchases of treasury stock	(41,240)	(31,237)
Payments for tax withheld on share-based compensation	(10,022)	(9,637)
NET CASH USED IN FINANCING ACTIVITIES	(105,299)	(59,341)
NET INCREASE IN CASH AND CASH EQUIVALENTS	28,914	50,438
CASH AND CASH EQUIVALENTS AT END OF PERIOD	187,286	127,058
NONCASH INVESTING ACTIVITIES
Equipment financed	3,478	19,498
Accruals for equipment received	10,106	7,574
Lease liabilities arising from obtaining right-of-use assets	$ 43,366	$ 30,210