Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash	$ 13,791	$ 18,526
Accounts receivable, net	366,989	321,810
Operating supplies	17,779	17,976
Other current assets	114,692	83,952
Total current assets	513,251	442,264
Property and equipment, net	295,543	268,539
Right-of-use assets - operating leases	108,149	104,612
Marketable securities and other investments	37,337	28,909
Other assets	210,909	22,841
Intangible assets, net	20,440	18,949
Goodwill	80,924	70,107
Total assets	1,266,553	956,221
Current liabilities:
Accounts payable	50,226	50,171
Accrued expenses	71,775	77,454
Current portion of long-term debt and finance lease liabilities	52,971	26,872
Other current liabilities	98,564	90,873
Total current liabilities	273,536	245,370
Long-term debt	274,267	230,768
Lease liabilities - finance leases	10,538	9,481
Lease liabilities - operating leases	69,748	68,878
Self-insurance accruals	85,421	77,926
Other noncurrent liabilities	213,018	24,020
Total liabilities	926,528	656,443
Redeemable common shares related to 401KSOP and Employee Stock Ownership Plan (ESOP) 8,728 and 9,188 shares at redemption value as of September 30, 2023 and December 31, 2022	181,543	169,978
Common shareholders' equity:
Common shares, $.50 par value, per share; 96,000 shares authorized; 77,100 and 76,640 shares issued and outstanding before deducting treasury shares and which excludes 8,728 and 9,188 shares subject to redemption as of September 30, 2023 and December 31, 2022	38,993	38,550
Additional paid-in capital	184,813	162,828
Common shares subscribed, unissued	22,742	23,864
Retained earnings	329,971	293,993
Accumulated other comprehensive loss	(5,646)	(5,588)
Shareholders' equity before treasury stock	570,873	513,647
Less: Cost of common shares held in treasury; 43,896 shares at September 30, 2023 and 43,110 shares at December 31, 2022	395,497	363,502
Common shares subscription receivable	16,894	20,345
Total common shareholders' equity	158,482	129,800
Total liabilities and shareholders' equity	$ 1,266,553	$ 956,221
Common stock, par value per share	$ 0.50	$ 0.50
Common stock, shares authorized	96,000,000	96,000,000
Common stock, shares, issued	77,100,000	76,640,000
Common stock, shares, outstanding, before treasury shares	77,100,000	76,640,000
Shares subject to redemption	8,728,000	9,188,000
Treasury stock, shares	43,896,000	43,110,000