CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 187,270	$ 286,642
Accounts receivable trade, net	600,197	716,190
Other receivables	3,358	3,967
Prepaid taxes	17,331	16,987
Prepaid expenses and other current assets	41,089	32,914
TOTAL CURRENT ASSETS	849,245	1,056,700
Restricted investments	20,763	18,065
Property and equipment, net	791,692	783,683
Right-of-use assets - operating leases	210,742	102,114
Right-of-use assets - financing leases	2,522	1,194
Other intangibles, net	304,607	197,386
Goodwill, net	733,695	629,402
Other assets	22,781	21,537
TOTAL ASSETS	2,936,047	2,810,081
CURRENT LIABILITIES:
Accounts payable trade	349,378	344,751
Accounts payable other	14,471	15,563
Accrued payroll	21,731	66,669
Accrued other	121,253	132,324
Lease liability - operating leases	44,690	29,547
Lease liability - financing leases	1,579	1,175
Current portion of long-term debt	105,108	101,741
TOTAL CURRENT LIABILITIES	658,210	691,770
Long-term debt	245,574	240,724
Non-current liabilities	55,287	43,505
Lease liability - operating leases	177,699	78,557
Lease liability - financing leases	865	0
Deferred taxes	163,767	155,923
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2023 and 2022	0	0
Additional paid-in capital	225,288	207,823
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	(15,458)	(15,458)
Retained earnings	1,949,110	1,781,582
Accumulated other comprehensive loss	(129)	(214)
Treasury stock; at cost, 13,323,268 shares in 2023 and 9,656,044 shares in 2022.	(524,927)	(374,892)
TOTAL STOCKHOLDERS' EQUITY	1,634,645	1,599,602
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,936,047	2,810,081
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	755	755
Class B Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	$ 6	$ 6