CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 342,429	$ 286,642
Accounts receivable trade, net	612,163	716,190
Other receivables	4,612	3,967
Prepaid taxes	15,258	16,987
Prepaid expenses and other current assets	15,445	32,914
TOTAL CURRENT ASSETS	989,907	1,056,700
Restricted investments	20,262	18,065
Property and equipment, net	783,127	783,683
Right-of-use assets - operating leases	167,681	102,114
Right-of-use assets - financing leases	3,744	1,194
Other intangibles, net	183,634	197,386
Goodwill	629,407	629,402
Other assets	22,280	21,537
TOTAL ASSETS	2,800,042	2,810,081
CURRENT LIABILITIES:
Accounts payable trade	293,005	344,751
Accounts payable other	12,213	15,563
Accrued payroll	23,292	66,669
Accrued other	128,825	132,324
Lease liability - operating leases	35,687	29,547
Lease liability - financing leases	2,365	1,175
Current portion of long-term debt	98,350	101,741
TOTAL CURRENT LIABILITIES	593,737	691,770
Long-term debt	238,213	240,724
Non-current liabilities	48,832	43,505
Lease liability - operating leases	141,450	78,557
Lease liability - financing leases	1,288	0
Deferred taxes	165,786	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	214,356	208,165
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	(15,458)	(15,458)
Retained earnings	1,889,867	1,781,582
Accumulated other comprehensive loss	(136)	(214)
Treasury stock; at cost, 9,910,177 shares in 2023 and 8,665,564 shares in 2022	(478,312)	(374,892)
TOTAL STOCKHOLDERS' EQUITY	1,610,736	1,599,602
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,800,042	2,810,081
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	413	413
Class B Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	$ 6	$ 6