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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Cash flows from operating activities:    
Net income including noncontrolling interests $ 10,352 $ 5,612
Adjustments to reconcile net income to net cash (used in) provided by operating activities:    
Depreciation 5,920 4,934
Income from equity method investments (697) (700)
Accrued interest income (341)  
Deferred income tax (2,271) 3
Stock based compensation expense 71 196
Gain on disposal of property and equipment (8)  
Changes in assets and liabilities:    
Accounts receivable (8,350) 2,705
Inventories (5,333) (3,370)
Other assets (1,894) (30)
Accounts payable, trade 1,011 (1,308)
Other liabilities (1,980) 723
Net cash (used in) provided by operating activities (3,520) 8,765
Cash flows from investing activities:    
Capital expenditures (3,061) (5,905)
Purchase of short-term investment (111,154)  
Restricted investments and deposits 5 51
Other 6 6
Net cash used in investing activities (114,204) (5,848)
Cash flows from financing activities:    
Treasury stock acquired (8,586)  
Capital contributions from minority investor 110  
Net cash used in financing activities (8,476)  
Net (decrease) increase in cash, cash equivalents and restricted cash (126,200) 2,917
Cash, cash equivalents and restricted cash, beginning of period 191,342 188,706
Cash, cash equivalents and restricted cash, end of period 65,142 191,623
Non cash investing activities – Accrued capital expenditures 142 1,284
Non cash financing activities – Stock awards accrued   167
Non cash financing activities – Accrued common stock repurchases 542  
Reconciliation of total cash, cash equivalents and restricted cash:    
Cash and cash equivalents 64,246 191,493
Restricted cash $ 896 $ 130