XML 12 R39.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
item
Mar. 31, 2013
item
Dec. 31, 2013
Financial Assets and Liabilities Fair Value Measurement      
Number of non-financial assets and liabilities impaired 0 0  
Assets      
Deferred compensation plan $ 12,886   $ 12,507
Derivative contracts 4,041   13,792
Total assets 16,927   26,299
Liabilities      
Deferred compensation plan 30,983   33,211
Derivative contracts 77,469   24,685
Total liabilities 108,452   57,896
Transfer of Assets from Level 1 to Level 2 0 0  
Transfer of Liabilities from Level 1 to Level 2 0 0  
Transfer of Assets from Level 2 to Level 1 0 0  
Transfer of Liabilities from Level 2 to Level 1 0 0  
Non-recurring basis
      
Assets      
Total assets 0    
Non-financial assets 0    
Liabilities      
Total liabilities 0    
Non-financial liabilities 0    
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring basis
      
Assets      
Deferred compensation plan 12,886   12,507
Total assets 12,886   12,507
Liabilities      
Deferred compensation plan 30,983   33,211
Total liabilities 30,983   33,211
Significant Other Observable Inputs (Level 2) | Recurring basis
      
Liabilities      
Derivative contracts 13,060   6,983
Total liabilities 13,060   6,983
Significant Unobservable Inputs (Level 3) | Recurring basis
      
Assets      
Derivative contracts 4,041   13,792
Total assets 4,041   13,792
Liabilities      
Derivative contracts 64,409   17,702
Total liabilities $ 64,409   $ 17,702