Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 985,727	$ 927,107
Short-term investments	47,047	40,336
Accounts receivable, less allowance for doubtful accounts of $7,369 at June 30, 2015 and $7,119 at December 31, 2014	1,194,180	1,236,042
Deferred Federal and state income taxes	20,930	20,279
Other	86,871	65,486
Total current assets	2,334,755	2,289,250
Property and equipment, less accumulated depreciation and amortization of $381,393 at June 30, 2015 and $371,756 at December 31, 2014	536,121	538,415
Goodwill	7,927	7,927
Other assets, net	53,572	55,313
Total assets	2,932,375	2,890,905
Current Liabilities:
Accounts payable	738,323	770,238
Accrued expenses, primarily salaries and related costs	228,537	192,468
Federal, state and foreign income taxes	26,821	21,077
Total current liabilities	993,681	983,783
Deferred Federal and state income taxes	$ 48,961	$ 35,514
Commitments and contingencies
Shareholders' Equity:
Preferred stock, none issued	$ 0	$ 0
Common stock, par value $0.01 per share. Issued and outstanding 189,117,916 shares at June 30, 2015 and 191,655,690 shares at December 31, 2014	1,891	1,916
Additional paid-in capital	2,349	1,113
Retained earnings	1,935,159	1,903,196
Accumulated other comprehensive loss	(52,778)	(37,817)
Total shareholders’ equity	1,886,621	1,868,408
Noncontrolling interest	3,112	3,200
Total equity	1,889,733	1,871,608
Total liabilities and equity	$ 2,932,375	$ 2,890,905