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Consolidated Condensed Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Cash flows from operating activities:    
Net income (loss) $ (73,437) $ (60,603)
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 34,156 31,679
Cost of real estate sales 6,713 9,241
Stock-based compensation expense 3,492 3,472
Deferred income taxes, net (44,067) (37,583)
Other non-cash income, net (1,611) (2,712)
Changes in assets and liabilities:    
Trade receivables, net 43,818 35,223
Inventories, net (21,032) (18,879)
Investments in real estate (462) (477)
Accounts payable and accrued liabilities 95,052 85,627
Other assets and liabilities, net (13,329) (10,411)
Net cash provided by operating activities 29,293 34,577
Cash flows from investing activities:    
Capital expenditures (46,751) (35,907)
Other investing activities, net 100 255
Net cash used in investing activities (46,651) (35,652)
Cash flows from financing activities:    
Dividends paid (7,489) (6,729)
Other financing activities, net 445 5,704
Net cash used in financing activities (7,044) (1,025)
Effect of exchange rate changes on cash and cash equivalents 23 32
Net decrease in cash and cash equivalents (24,379) (2,068)
Cash and cash equivalents:    
Beginning of period 138,604 46,053
End of period $ 114,225 $ 43,985