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Fair Value Measurements (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Apr. 24, 2016
Jul. 24, 2016
Oct. 25, 2015
Methods and assumptions used to estimate the fair value of the financial assets and liabilities      
Guarantee period at issue for rate of return on fixed income funds   1 year  
Recognized right to reclaim net cash collateral   $ 7,800 $ 2,300
Cash collateral posted   3,800 13,700
Realized gains/losses on closed positions   4,000 (11,400)
Fair value, long-term debt      
Fair value of long-term debt (including current maturities)   280,700 268,400
Impairment charge      
Goodwill impairment charge   991  
Fair Value | Recurring basis      
Assets at Fair Value:      
Cash and cash equivalents   379,597 347,239
Other trading securities   122,082 119,668
Commodity derivatives   5,230 6,485
Total Assets at Fair Value   506,909 473,392
Liabilities at Fair Value:      
Deferred compensation   57,051 57,869
Total Liabilities at Fair Value   57,051 57,869
Fair Value | Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Assets at Fair Value:      
Cash and cash equivalents   379,597 347,239
Other trading securities   40,214 39,329
Commodity derivatives   5,230 6,485
Total Assets at Fair Value   425,041 393,053
Liabilities at Fair Value:      
Deferred compensation   26,567 25,272
Total Liabilities at Fair Value   26,567 25,272
Fair Value | Recurring basis | Significant Other Observable Inputs (Level 2)      
Assets at Fair Value:      
Other trading securities   81,868 80,339
Total Assets at Fair Value   81,868 80,339
Liabilities at Fair Value:      
Deferred compensation   30,484 32,597
Total Liabilities at Fair Value   $ 30,484 $ 32,597
Assets Held For Sale | Portion of DCB      
Impairment charge      
Goodwill impairment charge $ 1,000