Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 8,768	$ 4,831
Accounts receivable	119,575	119,504
Inventories	6,315	5,705
Prepaid income taxes	5,349	10,646
Prepaid expenses	19,148	19,154
Total current assets	159,155	159,840
Investments of deferred compensation plans	70,632	65,624
Properties and equipment, at cost, less accumulated depreciation of $254,499 (2018 - $248,370)	164,629	162,033
Lease right of use assets less accumulated amortization of $5,450	87,811
Identifiable intangible assets less accumulated amortization of $33,803 (2018 - $33,284)	67,868	68,253
Goodwill	510,598	510,570
Other assets	9,138	9,209
Total Assets	1,069,831	975,529
Current liabilities
Accounts payable	39,737	50,150
Income taxes	3,922
Accrued insurance	48,477	46,095
Accrued compensation	52,526	63,329
Accrued legal	8,163	1,857
Short-term lease liability	30,699
Other current liabilities	33,576	30,239
Total current liabilities	217,100	191,670
Deferred income taxes	18,108	21,598
Long-term debt	100,000	89,200
Deferred compensation liabilities	70,934	64,616
Long-term lease liability	67,960
Other liabilities	7,719	17,111
Total Liabilities	481,821	384,195
Commitments and contingencies (Note 10)
STOCKHOLDERS' EQUITY
Capital stock - authorized 80,000,000 shares $1 par; issued 35,520,908 shares (2018 - 35,311,418 shares)	35,521	35,311
Paid-in capital	803,701	774,358
Retained earnings	1,265,485	1,225,617
Treasury stock - 19,661,407 shares (2018 - 19,438,358)	(1,519,077)	(1,446,296)
Deferred compensation payable in Company stock	2,380	2,344
Total Stockholders' Equity	588,010	591,334
Total Liabilities and Stockholders' Equity	$ 1,069,831	$ 975,529