Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 1,013,917	$ 807,796
Accounts receivable, less allowance for doubtful accounts of $8,919 at March 31, 2016 and $7,820 at December 31, 2015	1,010,667	1,112,260
Deferred Federal and state income taxes	18,203	16,861
Other	44,693	56,453
Total current assets	2,087,480	1,993,370
Property and equipment, less accumulated depreciation and amortization of $396,497 at March 31, 2016 and $385,023 at December 31, 2015	526,941	524,724
Goodwill	7,927	7,927
Other assets, net	57,395	56,417
Total assets	2,679,743	2,582,438
Current Liabilities:
Accounts payable	623,699	645,304
Accrued expenses, primarily salaries and related costs	202,284	186,571
Federal, state and foreign income taxes	28,432	29,498
Total current liabilities	854,415	861,373
Deferred Federal and state income taxes	$ 42,817	$ 26,389
Commitments and contingencies
Shareholders' Equity:
Preferred stock, none issued	$ 0	$ 0
Common stock, par value $0.01 per share. Issued and outstanding 181,562 shares at March 31, 2016 and 182,067 shares at December 31, 2015	1,816	1,821
Additional paid-in capital	3,851	31
Retained earnings	1,845,356	1,771,379
Accumulated other comprehensive loss	(71,772)	(81,238)
Total shareholders’ equity	1,779,251	1,691,993
Noncontrolling interest	3,260	2,683
Total equity	1,782,511	1,694,676
Total liabilities and equity	$ 2,679,743	$ 2,582,438