Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 28,951	$ 6,158
Accounts receivable less allowances of $1,427 (2019 -$353)	134,695	143,827
Inventories	7,313	7,462
Prepaid income taxes	5,917	10,074
Prepaid expenses	21,939	23,150
Total current assets	198,815	190,671
Investments of deferred compensation plans	72,296	77,446
Properties and equipment, at cost, less accumulated depreciation of $278,768 (2019 - $270,140)	183,729	175,763
Lease right of use asset	112,302	111,652
Identifiable intangible assets less accumulated amortization of $40,094 (2019 - $37,620)	124,219	126,370
Goodwill	577,236	577,367
Other assets	8,962	9,048
Total Assets	1,277,559	1,268,317
Current liabilities
Accounts payable	37,838	51,101
Accrued insurance	56,480	50,328
Accrued compensation	63,622	70,814
Accrued legal	7,114	6,941
Short-term lease liability	36,252	39,280
Other current liabilities	45,431	43,756
Total current liabilities	246,737	262,220
Deferred income taxes	20,681	18,504
Long-term debt	160,000	90,000
Deferred compensation liabilities	70,363	76,446
Long-term lease liability	88,278	86,656
Other liabilities	7,899	7,883
Total Liabilities	593,958	541,709
Commitments and contingencies (Note 11)
STOCKHOLDERS' EQUITY
Capital stock - authorized 80,000,000 shares $1 par; issued 35,911,724 shares (2019 - 35,810,528 shares)	35,912	35,811
Paid-in capital	878,550	860,671
Retained earnings	1,476,151	1,425,752
Treasury stock - 20,116,345 shares (2019 - 19,867,220 shares)	(1,709,390)	(1,597,940)
Deferred compensation payable in Company stock	2,378	2,314
Total Stockholders' Equity	683,601	726,608
Total Liabilities and Stockholders' Equity	$ 1,277,559	$ 1,268,317