Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 7,781	$ 32,895
Accounts receivable	121,662	137,217
Inventories	10,469	10,109
Prepaid income taxes	27,526	17,377
Prepaid expenses	31,431	32,688
Total current assets	198,869	230,286
Investments of deferred compensation plans	90,097	98,884
Properties and equipment, at cost, less accumulated depreciation of $337,528 (2021- $317,911)	193,705	193,680
Lease right of use asset	131,430	125,048
Identifiable intangible assets less accumulated amortization of $65,203 (2021 - $57,648)	102,103	108,096
Goodwill	579,887	578,591
Other assets	60,104	8,138
Total Assets	1,356,195	1,342,723
Current liabilities
Accounts payable	77,170	73,024
Current portion of long-term debt	5,000
Income taxes		41
Accrued insurance	56,732	55,918
Accrued compensation	67,230	95,598
Accrued legal	653	872
Short-term lease liability	39,813	37,913
Other current liabilities	51,552	39,033
Total current liabilities	298,150	302,399
Deferred income taxes	33,590	23,183
Long-term debt	95,850	185,000
Deferred compensation liabilities	89,873	98,597
Long-term lease liability	105,594	100,629
Other liabilities	11,722	9,642
Total Liabilities	634,779	719,450
Commitments and contingencies (Note 10)
STOCKHOLDERS' EQUITY
Capital stock - authorized 80,000,000 shares $1 par; issued 36,670,460 shares (2021 - 36,513,857 shares)	36,670	36,514
Paid-in capital	1,100,161	1,044,341
Retained earnings	2,141,418	1,970,311
Treasury stock - 21,866,038 shares (2021 - 21,601,325 shares)	(2,559,141)	(2,430,094)
Deferred compensation payable in Company stock	2,308	2,201
Total Stockholders' Equity	721,416	623,273
Total Liabilities and Stockholders' Equity	$ 1,356,195	$ 1,342,723