CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
CURRENT ASSETS:
Cash and cash equivalents	$ 286,642	$ 159,784
Accounts receivable trade, net	716,190	701,512
Other receivables	3,967	3,022
Prepaid taxes	16,987	2,191
Prepaid expenses and other current assets	32,914	27,779
TOTAL CURRENT ASSETS	1,056,700	894,288
Restricted investments	18,065	24,256
Property and equipment, net	783,683	681,451
Right-of-use assets - operating leases	102,114	44,036
Right-of-use assets - financing leases	1,194	1,252
Other intangibles, net	197,386	196,672
Goodwill, net	629,402	576,913
Other assets	21,537	18,426
TOTAL ASSETS	2,810,081	2,437,294
CURRENT LIABILITIES:
Accounts payable trade	344,751	424,923
Accounts payable other	15,563	12,493
Accrued payroll	66,669	56,938
Accrued other	132,324	82,827
Lease liability - operating leases	29,547	11,364
Lease liability - financing leases	1,175	1,251
Current portion of long-term debt	101,741	97,273
TOTAL CURRENT LIABILITIES	691,770	687,069
Long-term debt	240,724	177,479
Non-current liabilities	43,505	41,572
Lease liability - operating leases	78,557	34,916
Deferred taxes	155,923	155,944
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par value; 2,000,000 shares authorized; no shares issued or outstanding in 2022 and 2021 Common stock	0	0
Additional paid-in capital	208,165	189,256
Purchase price in excess of predecessor basis, net of tax benefit of $10,306	(15,458)	(15,458)
Retained earnings	1,781,582	1,424,634
Accumulated other comprehensive loss	(214)	(207)
Treasury stock; at cost, 7,675,084 shares in 2021 and 7,675,084 shares in 2020	(374,892)	(258,330)
TOTAL STOCKHOLDERS' EQUITY	1,599,602	1,340,314
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,810,081	2,437,294
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	413	412
Class B Common Stock [Member]
STOCKHOLDERS' EQUITY:
Common stock	$ 6	$ 7