Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 240,627	$ 373,669
Receivables, net of allowance for doubtful accounts of $31,533 and $31,328	1,415,390	1,189,637
Deferred tax asset	6,743	8,382
Prepaid expenses and other	44,841	39,855
Total current assets	1,707,601	1,611,543
Property and equipment, net	132,255	126,830
Goodwill	359,372	359,688
Intangible and other assets, net	40,771	39,980
Total assets	2,239,999	2,138,041
Current liabilities:
Accounts payable and outstanding checks	834,692	704,734
Accrued expenses:
Compensation and profit-sharing contribution	65,265	117,541
Income taxes and other	49,384	54,357
Total current liabilities	949,341	876,632
Long term liabilities:
Noncurrent income taxes payable	11,506	11,343
Other long term liabilities	962	1,592
Total liabilities	961,809	889,567
Stockholders' investment:
Preferred stock, $0.10 par value, 20,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.10 par value, 480,000 shares authorized; 177,271 and 177,312 shares issued; 162,170 and 163,441 shares outstanding	16,217	16,344
Retained earnings	1,957,462	1,845,032
Additional paid-in capital	206,846	205,794
Accumulated other comprehensive loss	(11,745)	(9,115)
Treasury stock at cost (15,101 and 13,871 shares)	(890,590)	(809,581)
Total stockholders' investment	1,278,190	1,248,474
Total liabilities and stockholders' investment	$ 2,239,999	$ 2,138,041