Consolidated Statement Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Cash flows from operating activities:
Cash received from customers	$ 11,913,347	$ 11,514,374
Cash paid to vendors and employees	(11,800,318)	(12,038,399)
Interest paid, net	(35,101)	(33,763)
Income taxes paid	(14,739)	(8,830)
Net cash provided by (used in) operating activities	63,189	(566,618)
Cash flows from investing activities:
Expenditures for property and equipment	(7,745)	(4,894)
Software and software development costs	(7,534)	(3,561)
Other	(548)	(267)
Net cash used in investing activities	(15,827)	(8,722)
Cash flows from financing activities:
Principal payments on long-term debt	(5,224)	(2,899)
Cash paid for debt issuance costs	(1,028)	0
Net borrowings (repayments) on revolving credit loans	14,227	(13,291)
Payments for employee tax withholdings on equity awards	(8,602)	(6,255)
Proceeds from the reissuance of treasury stock	495	442
Payments for Repurchase of Common Stock	(35,681)	0
Net cash used in financing activities	(35,813)	(22,003)
Effect of exchange rate changes on cash and cash equivalents	(13,172)	(12,708)
Net decrease in cash and cash equivalents	(1,623)	(610,051)
Cash and cash equivalents at beginning of year	799,123	955,628
Cash and cash equivalents at end of period	797,500	345,577
Reconciliation of net income to net cash provided by operating activities:
Net income	55,400	33,699
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	37,257	40,481
Provision for losses on accounts receivable	1,765	924
Stock-based compensation expense	8,305	7,587
Accretion of debt discount and debt issuance costs	378	378
Changes in operating assets and liabilities:
Accounts receivable	751,836	670,528
Inventories	2,450	(7,387)
Prepaid expenses and other assets	2,245	(30,344)
Accounts payable	706,381	1,132,019
Accrued expenses and other liabilities	90,066	150,465
Total adjustments	7,789	(600,317)
Net cash provided by (used in) operating activities	$ 63,189	$ (566,618)