Unaudited Consolidated Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 18,871	$ 15,310
Accounts receivable less allowances of $14,997 (2016 - $14,236)	91,483	132,021
Inventories	5,658	5,755
Prepaid income taxes	3,621	3,709
Prepaid expenses	15,678	13,105
Total current assets	135,311	169,900
Investments of deferred compensation plans	60,445	54,389
Properties and equipment, at cost, less accumulated depreciation of $227,036 (2016 - $211,290)	143,148	121,302
Identifiable intangible assets less accumulated amortization of $32,862 (2016 - $33,225)	54,793	55,065
Goodwill	473,024	472,366
Deferred income taxes	21,893	8
Other assets	6,845	7,029
Total Assets	895,459	880,059
Current liabilities
Accounts payable	34,752	39,586
Current portion of long-term debt	10,000	8,750
Income taxes	12,349
Accrued insurance	44,584	47,960
Accrued compensation	53,857	53,979
Accrued legal	91,450	1,805
Other current liabilities	22,382	19,752
Total current liabilities	269,374	171,832
Deferred income taxes		14,291
Long-term debt	72,500	100,000
Deferred compensation liabilities	59,389	54,288
Other liabilities	16,494	15,549
Total Liabilities	417,757	355,960
Commitments and contingencies (Note 11)
Stockholders' Equity
Capital stock - authorized 80,000,000 shares $1 par; issued 34,513,535 shares (2016 - 34,270,104 shares)	34,514	34,270
Paid-in capital	668,573	639,703
Retained earnings	988,895	958,149
Treasury stock - 18,632,687 shares (2016 - 18,083,527)	(1,216,509)	(1,110,536)
Deferred compensation payable in Company stock	2,229	2,513
Total Stockholders' Equity	477,702	524,099
Total Liabilities and Stockholders' Equity	$ 895,459	$ 880,059