Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows used in operating activities:
Net income	$ 15,309	$ 11,671
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	3,531	3,720
Bad debt provision	4,921	6,907
Deferred income taxes	(121)	43
Share-based compensation expense	2,484	2,058
Amortization of premium on marketable securities	459	533
Unrealized gain on deferred compensation fund investments	(4,110)	(1,502)
Changes in other long-term liabilities	1,308	336
Net loss on disposals of property and equipment	180	128
Changes in operating assets and liabilities:
Accounts and notes receivable	(27,007)	(20,633)
Inventories and supplies	438	935
Prepaid expenses and other assets	3,350	4,076
Deferred compensation funding	653	683
Accounts payable and other accrued expenses	(13,493)	(6,422)
Accrued payroll, accrued and withheld payroll taxes	(16,815)	(19,766)
Income taxes payable	(2,070)	(2,136)
Accrued insurance claims	1,556	2,366
Deferred compensation liability	3,394	713
Net cash used in operating activities	(26,033)	(16,290)
Cash flows from (used in) investing activities:
Disposals of property and equipment	25	57
Additions to property and equipment	(2,198)	(1,010)
Acquisition of equity method investment	(2,750)	0
Sales of marketable securities	16,639	210
Net cash from (used in) investing activities	11,716	(743)
Cash flows from financing activities:
Purchases of treasury stock	0	(2,223)
Proceeds from short-term borrowings	15,000	10,000
Payments of statutory withholding on net issuance of restricted stock units	(1,030)	(870)
Net cash from financing activities	13,970	6,907
Net decrease in cash, cash equivalents and restricted cash equivalents	(347)	(10,126)
Cash, cash equivalents and restricted cash equivalents at beginning of the period		26,279
Cash, cash equivalents and restricted cash equivalents at end of the period	$ 53,983	$ 16,153