XML 24 R47.htm IDEA: XBRL DOCUMENT v3.2.0.727
Investments (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 01, 2015
Jul. 31, 2015
Jul. 31, 2014
Jan. 31, 2015
Investments (Details) [Line Items]        
Proceeds from Equity Method Investment, Dividends or Distributions   $ (5,638) $ (8,592)  
Gain (Loss) on Sale of Investments   (10,385)    
Other Assets, Noncurrent   8,118   $ 6,366
Related to Estimated Escrow Proceeds [Member]        
Investments (Details) [Line Items]        
Accounts Receivable, Net   2,200    
Other Assets, Noncurrent   2,200    
Money Market Funds [Member]        
Investments (Details) [Line Items]        
Business Acquisition, Percentage of Voting Interests Acquired 100.00%      
Big River [Member]        
Investments (Details) [Line Items]        
Retained Earnings, Undistributed Earnings from Equity Method Investees   21,800    
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries   335,500   322,100
Patriot And Big River [Member]        
Investments (Details) [Line Items]        
Retained Earnings, Undistributed Earnings from Equity Method Investees       41,900
Proceeds from Equity Method Investment, Dividends or Distributions   $ 5,600 $ 8,600  
Patriot [Member]        
Investments (Details) [Line Items]        
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries       $ 99,800
Cash Received at Closing, Merger Consideration $ 45,500      
Total Merger Consideration 196,000      
Gain (Loss) on Sale of Investments $ 10,400