CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 220,247	$ 187,270
Accounts receivable trade, net	583,759	600,197
Accounts receivable other	3,771	3,358
Prepaid taxes	12,791	17,331
Prepaid expenses and other current assets	16,139	41,089
TOTAL CURRENT ASSETS	836,707	849,245
Restricted investments	21,044	20,763
Property and equipment, net	759,779	791,692
Right-of-use assets - operating leases	196,465	210,742
Right-of-use assets - financing leases	1,538	2,522
Other intangibles, net	248,391	304,607
Goodwill	771,894	733,695
Other non-current assets	22,885	22,781
TOTAL ASSETS	2,858,703	2,936,047
CURRENT LIABILITIES:
Accounts payable trade	325,569	349,378
Accounts payable other	24,143	14,471
Accrued payroll	29,429	21,731
Accrued other	111,874	121,253
Lease liability - operating leases	40,142	44,690
Lease liability - financing leases	805	1,579
Current portion of long-term debt	103,192	105,108
TOTAL CURRENT LIABILITIES	635,154	658,210
Long-term debt	209,875	245,574
Other non-current liabilities	53,213	55,287
Lease liability - operating leases	163,669	177,699
Lease liability - financing leases	664	865
Deferred taxes	154,998	163,767
STOCKHOLDERS' EQUITY:
Preferred stock:$.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2024 and 2023	0	0
Additional paid-in capital	211,346	209,830
Retained earnings	1,989,600	1,949,110
Accumulated other comprehensive loss	(200)	(129)
Treasury stock; at cost, 10,650,225 shares in 2024 and 13,323,268 shares in 2023.	(560,345)	(524,927)
TOTAL STOCKHOLDERS' EQUITY	1,641,130	1,634,645
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,858,703	2,936,047
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	723	755
Class B Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	$ 6	$ 6