Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Cash flows from operating activities:
Cash received from customers	$ 20,055,571	$ 21,579,962
Cash paid to vendors and employees	(19,753,530)	(21,574,482)
Interest paid, net	(17,759)	(21,698)
Income taxes paid	(62,920)	(41,761)
Net cash provided by (used in) operating activities	221,362	(57,979)
Cash flows from investing activities:
Acquisition of business (Note 6)	(27,848)	0
Proceeds from sale of property and equipment	0	7,121
Expenditures for property and equipment	(13,943)	(11,879)
Software and software development costs	(9,234)	(7,341)
Proceeds from sale of subsidiaries (Note 7)	20,020	0
Net cash used in investing activities	(31,005)	(12,099)
Cash flows from financing activities:
Proceeds from the reissuance of treasury stock	376	774
Cash paid for purchase of treasury stock	(147,003)	0
Net borrowings on revolving credit loans	5,170	2,826
Principal payments on long-term debt	(319)	(419)
Acquisition earn-out payment	(2,736)	(5,060)
Excess tax benefit from stock-based compensation	179	667
Net cash used in financing activities	(144,333)	(1,212)
Effect of exchange rate changes on cash and cash equivalents	(3,059)	(33,073)
Net increase (decrease) in cash and cash equivalents	42,965	(104,363)
Cash and cash equivalents at beginning of year	542,995	570,101
Cash and cash equivalents at end of period	585,960	465,738
Reconciliation of net income to net cash provided by (used in) operating activities:
Net income	169,589	94,495
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Loss on disposal of subsidiaries	699	0
Depreciation and amortization	42,518	52,691
Gain on sale of building	0	(2,350)
Provision for losses on accounts receivable	5,041	8,668
Stock-based compensation expense	11,399	9,698
Accretion of debt discount and debt issuance costs on Senior Notes	630	630
Excess tax benefits from stock-based compensation	(179)	(667)
Changes in operating assets and liabilities:
Accounts receivable	(158,020)	18,399
Inventories	(177,643)	45,731
Prepaid expenses and other assets	(22,405)	31,259
Accounts payable	397,721	(300,804)
Accrued expenses and other liabilities	(47,988)	(15,729)
Total adjustments	51,773	(152,474)
Net cash provided by (used in) operating activities	$ 221,362	$ (57,979)