Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 1,042,700	$ 807,796
Accounts receivable, less allowance for doubtful accounts of $10,238 at September 30, 2016 and $7,820 at December 31, 2015	1,108,516	1,112,260
Deferred Federal and state income taxes	19,573	16,861
Other	64,897	56,453
Total current assets	2,235,686	1,993,370
Property and equipment, less accumulated depreciation and amortization of $406,181 at September 30, 2016 and $385,023 at December 31, 2015	539,984	524,724
Goodwill	7,927	7,927
Other assets, net	30,200	56,417
Total assets	2,813,797	2,582,438
Current Liabilities:
Accounts payable	698,620	645,304
Accrued expenses, primarily salaries and related costs	207,547	186,571
Federal, state and foreign income taxes	21,437	29,498
Total current liabilities	927,604	861,373
Deferred Federal and state income taxes	32,260	26,389
Commitments and contingencies
Shareholders' Equity:
Preferred stock, none issued	0	0
Common stock, par value $0.01 per share. Issued and outstanding 180,278 shares at September 30, 2016 and 182,067 shares at December 31, 2015	1,803	1,821
Additional paid-in capital	475	31
Retained earnings	1,929,449	1,771,379
Accumulated other comprehensive loss	(81,644)	(81,238)
Total shareholders’ equity	1,850,083	1,691,993
Noncontrolling interest	3,850	2,683
Total equity	1,853,933	1,694,676
Total liabilities and equity	$ 2,813,797	$ 2,582,438