Consolidated Balance Sheet - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 15,235	$ 14,727
Accounts receivable less allowances of $13,631 (2015 - $13,244)	143,040	106,262
Inventories	6,102	6,314
Prepaid income taxes	3,258	10,653
Prepaid expenses	12,306	12,852
Total current assets	179,941	150,808
Investments of deferred compensation plans	49,195	49,481
Properties and equipment, at cost, less accumulated depreciation of $206,992 (2015 - $201,094)	119,331	117,370
Identifiable intangible assets less accumulated amortization of $32,960 (2015 - $32,866)	55,018	55,111
Goodwill	472,438	472,322
Other assets	6,996	7,233
Total Assets	882,919	852,325
Current liabilities
Accounts payable	50,721	43,695
Current portion of long-term debt	18,000	7,500
Income taxes	11,129
Accrued insurance	45,628	43,972
Accrued compensation	43,844	52,817
Accrued legal	2,819	1,233
Other current liabilities	19,416	22,119
Total current liabilities	191,557	171,336
Deferred income taxes	16,861	21,041
Long-term debt	126,875	83,750
Deferred compensation liabilities	49,188	49,467
Other liabilities	13,617	13,478
Total Liabilities	$ 398,098	$ 339,072
Commitments and contingencies
STOCKHOLDERS' EQUITY
Capital stock - authorized 80,000,000 shares $1 par; issued 34,076,407 shares (2015 - 33,985,316 shares)	$ 34,076	$ 33,985
Paid-in capital	610,219	603,006
Retained earnings	886,604	865,845
Treasury stock - 17,618,767 shares (2015 - 17,187,540 shares)	(1,048,509)	(991,978)
Deferred compensation payable in Company stock	2,431	2,395
Total Stockholders' Equity	484,821	513,253
Total Liabilities and Stockholders' Equity	$ 882,919	$ 852,325