UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net income	$ 99,756	$ 80,353
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,801	24,188
Amortization of deferred financing fees	264	266
Stock-based compensation	13,895	10,724
Insurance proceeds and (gain) loss on long-lived assets, net	1,915	420
Other operating activities, net	613	646
Change in operating assets and liabilities
Accounts receivable	(24,009)	(14,589)
Prepaid income taxes	1,878	13,057
Prepaid expenses and other assets	(986)	(9,360)
Cash surrender value of life insurance policy premiums	(7,490)	(7,489)
Deferred compensation liability	6,926	7,441
Operating lease obligations	(183)	(102)
Accounts payable	18,705	(3,521)
Accrued wages and related liabilities	(97,663)	(60,021)
Other accrued liabilities	27,283	21,497
Accrued self-insurance liabilities	30,449	8,710
NET CASH PROVIDED BY OPERATING ACTIVITIES	100,154	72,220
Cash flows from investing activities:
Purchase of property and equipment	(35,473)	(42,926)
Cash payments for acquisitions	(28,737)	(194,241)
Cash proceeds from insurance recoveries and sale of assets	83	1,494
Purchases of investments	(36,866)	(25,984)
Maturities of investments	29,717	17,862
Other investing activities, net	89	(9)
NET CASH USED IN INVESTING ACTIVITIES	(71,187)	(243,804)
Cash flows from financing activities:
Payments on debt	(1,042)	(1,009)
Issuance of common stock upon exercise of options	11,490	5,050
Repurchase of shares of common stock to satisfy tax withholding obligations	(23)	(14)
Repurchase of shares of common stock (Note 19)	0	(10,775)
Dividends paid	(3,775)	(3,589)
Other financing activities	0	(11)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	6,650	(10,348)
Net increase (decrease) in cash and cash equivalents	35,617	(181,932)
Cash and cash equivalents beginning of period	503,881	464,598
Cash and cash equivalents end of period	539,498	282,666
Cash paid during the period for:
Interest	1,664	1,769
Income taxes	425	0
Lease liabilities	66,078	59,165
Non-cash financing and investing activity
Accrued capital expenditures	9,970	7,800
Accrued dividends declared	3,797	3,597
Right-of-use assets obtained in exchange for new and modified operating lease obligations	$ 68,296	$ 57,961