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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Cash flows from operating activities:    
Net income $ 32,585 $ 41,260
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 27,809 30,464
ROU asset amortization 46,626  
Provision (benefit) for deferred income taxes 4,163 (7,166)
Share-based compensation expense 5,553 5,524
Loss on disposition of property and equipment, net 552 1,985
Changes in assets and liabilities:    
Receivables (8,003) (12,194)
Inventory (38,551) (54,379)
Prepaid expenses and other assets (12,396) 1,599
Payables, accrued expenses, operating lease liabilities and other liabilities (32,445) 47,022
Net cash provided by operating activities 25,893 54,115
Cash flows from investing activities:    
Cash paid for property and equipment (37,716) (24,634)
Cash paid for marketable securities (129,896) (52,237)
Sales and maturities of marketable securities 151,761 57,400
Net cash used in investing activities (15,851) (19,471)
Cash flows from financing activities:    
Proceeds from the exercise of stock options 974 5,273
Share repurchases related to share repurchase program (71,242)  
Share repurchases related to taxes for share-based awards (5,383) (5,047)
Net cash (used in) provided by financing activities (75,651) 226
Effect of exchange rate changes on cash and cash equivalents (1,452) (3,377)
(Decrease) increase in cash and cash equivalents (67,061) 31,493
Cash and cash equivalents at beginning of period 358,260 282,220
Cash and cash equivalents at end of period 291,199 313,713
Cash paid during the year for:    
Income taxes 3,030 2,414
Non-cash investing activities—Accrued capital expenditures $ 31,761 $ 26,177