Consolidated Balance Sheet - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 17,474	$ 14,727
Accounts receivable less allowances of $14,769 (2015 - $13,244)	98,952	106,262
Inventories	6,120	6,314
Prepaid income taxes	8,964	10,653
Prepaid expenses	15,457	12,852
Total current assets	146,967	150,808
Investments of deferred compensation plans	53,127	49,481
Properties and equipment, at cost, less accumulated depreciation of $205,323 (2015 - $201,094)	118,502	117,370
Identifiable intangible assets less accumulated amortization of $33,051 (2015 - $32,866)	54,928	55,111
Goodwill	472,471	472,322
Other assets	6,960	7,233
Total Assets	852,955	852,325
Current liabilities
Accounts payable	41,962	43,695
Current portion of long-term debt	7,500	7,500
Accrued insurance	44,704	43,972
Accrued compensation	51,289	52,817
Accrued legal	1,729	1,233
Other current liabilities	20,267	22,119
Total current liabilities	167,451	171,336
Deferred income taxes	16,832	21,041
Long-term debt	140,000	83,750
Deferred compensation liabilities	52,452	49,467
Other liabilities	14,638	13,478
Total Liabilities	391,373	339,072
Commitments and contingencies
STOCKHOLDERS' EQUITY
Capital stock - authorized 80,000,000 shares $1 par; issued 34,104,899 shares (2015 - 33,985,316 shares)	34,105	33,985
Paid-in capital	617,793	603,006
Retained earnings	907,531	865,845
Treasury stock - 18,014,005 shares (2015 - 17,187,540 shares)	(1,100,314)	(991,978)
Deferred compensation payable in Company stock	2,467	2,395
Total Stockholders' Equity	461,582	513,253
Total Liabilities and Stockholders' Equity	$ 852,955	$ 852,325