Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
Cash flows from operating activities:
Cash received from customers	$ 7,093,723	$ 6,506,634
Cash paid to vendors and employees	(6,793,778)	(6,389,994)
Interest paid, net	(8,369)	(8,301)
Income taxes paid	(15,821)	(1,005)
Net cash provided by operating activities	275,755	107,334
Cash flows from investing activities:
Expenditures for property and equipment	(7,166)	(4,227)
Software and software development costs	(4,397)	(3,017)
Proceeds from sale of subsidiaries	0	18,747
Net cash (used in) provided by investing activities	(11,563)	11,503
Cash flows from financing activities:
Payments for employee tax withholdings on equity awards	(4,093)	(4,352)
Net (repayments) borrowings on revolving credit loans	(1,187)	3,035
Proceeds from the reissuance of treasury stock	146	104
Cash paid for purchase of treasury stock	0	(47,003)
Principal payments on long-term debt	0	(118)
Acquisition earn-out payment	0	(2,736)
Net cash used in financing activities	(5,134)	(51,070)
Effect of exchange rate changes on cash and cash equivalents	35,507	8,421
Net increase in cash and cash equivalents	294,565	76,188
Cash and cash equivalents at beginning of year	531,169	542,995
Cash and cash equivalents at end of period	825,734	619,183
Reconciliation of net income to net cash provided by operating activities:
Net income	33,373	51,277
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on disposal of subsidiaries	0	363
Depreciation and amortization	14,047	14,179
Provision for losses on accounts receivable	(1,305)	(408)
Stock-based compensation expense	3,657	3,818
Accretion of debt discount and debt issuance costs on Senior Notes	208	187
Changes in operating assets and liabilities:
Accounts receivable	519,337	237,196
Inventories	93,260	(8,122)
Prepaid expenses and other assets	50,479	(28,690)
Accounts payable	(381,928)	(134,682)
Accrued expenses and other liabilities	(55,373)	(27,784)
Total adjustments	242,382	56,057
Net cash provided by operating activities	$ 275,755	$ 107,334